UH0001 (LUV001)

UH0004 (LUV004, LUV105)

Tomaso di Levrieri to the most Reverend [issi] mo Priore Padre Ludovicho: Triangle lock with slit parallel to the fore-edge (August 13, 1591).

UH0005 (LUV005)

Triangle lock-O letter from Bosuto di Parona to Reverend Ambrosio

UH0013 (LUV013)

Queen Elizabeth I's letter appointing Sir Ralph Sadler to act as keeper of England's most dangerous prisoner, Mary, Queen of Scots (1584) 


UH0014 (LUV014)

Original: Drawing: FVII Document security categorization of letters, maps, and bookbindings. Drawing: Box 4.

UH0015 (LUV015, LUV020, LUV260)

Elizabeth I to Sir Rafe Sadler: Triangle lock w/slit perpendicular to fore-edge (1584)

UH0016 (LUV016)

Lucy May Schofield's "Pis'ma-treigol'niki = Letters of triangles(2013)

UH0019

Original: Brienne Trunk, Brienne Collection, Sound & Vision The Hague.


UH0023 (LUV023)

Constantijn Huygens to Amalia von Solms(1635)

UH0027 (LUV027)

The John Donne Lock: John Donne to Sir Thomas Egerton (February 12, 1602)

UH0028 (LUV029)

John Donne's triangle-locked letter to Sir Robert Cotton (1602)

UH0030 (LUV030)

John Donne's tuck-and-seal letter to Sir Nicholas Carew (1625)


UH0035 (LUV035) 

Research prep: Box 19.

Video: JD, NA, AL, UHRG, “Container egg for secret messages (1579).” Filmed: May 2015. Duration: 6:10. https://youtu.be/u5AOqOxFDiA. Accessed March 4, 2025.

UH0037 (LUV037)

WWII POW letter to his mother: Dino Belardinelli to Signora Natalina Belardinelli, Oran, Algeria (December 27, 1944).

UH0038 (LUV269)

Letterlocking love bug. Original and model: Box 25. 

Video: NiA, JD, UHRG, “Love bug—numbered Foldable version, USA (2021).” Filmed: July 30, 2021. Duration: 4:58. https://youtu.be/teHWx3MdjyQ. Accessed March 4, 2025.

UH0040 (LUV040)

Ceremonial letter from Bey Mahmud ibn Muhammad to President James Madison USA(September 24, 1817)

UH0042 (LUV042)

Elizabeth I’s triangle lock-o letter to Sir Ralph Sadler (31 October 1584)

UH0044 (LUV044)

Original: M.A. de la misericorde de Jesus Christ to Madame Collin (1691). Brienne Collection, Sound & Vision, The Hague, DB-1465.

Model: Box 21.

Video: JD, SSU, UHRG, “A pleated letter from a nun to her mother, France (1691).” Filmed: December 2015. Duration: 3:37. https://youtu.be/AOD266RPOac. Accessed March 4, 2025.

UH0047 (LUV047)

Original: Hansen van Muers Leendert to Marie Janse Jean van Gorecomt (January 20, 1694). Brienne Collection, Sound & Vision The Hague, DB-1876.

Model: Box 21.

Video: JD, SSU, UHRG, “‘I wish you 100,000 good nights . . . ,’ diamond letter, Holland (1694).” Filmed: December 2015. Duration: 2:25. https://youtu.be/ w3FXlLGxtNo. Accessed March 4, 2025.


UH0048 (LUV048)

Original: André le Maistre to Reverend Father Dom Francois Bougais (January 17, 1702). Brienne Collection, Sound & Vision The Hague, DB-2040.

Model: Box 21.

Video: JD, SSU, UHRG, “André le Maistre’s pleated letter to Father François Bougais, France (1702).” Filmed: December 2015. Duration: 3:21. https://youtu.be/4Z7IhxEwasw. Accessed March 4, 2025.


UH0050 (LUV050)

Original: Gabrielle Bertras to Francois Mequigno (November 19, ca. 1689–1706). Brienne Collection, Sound & Vision The Hague, DB-2159.

Model: Box 21.

Video: JD, SSU, UHRG, “Gold-flecked seal ‘rectangle inside,’ France (1690–1711).” Filmed: December 2015. Duration: 2:47. https://youtu.be/V1G58Pt6bwk. Accessed March 4, 2025.


UH0051 (LUV051)

Hate Mail?: A Diamond-shaped letter in the Brienne Postal Archive, Europe (1690–1711)

UH0052 (LUV052)

Original: Simkin G., Field PO Box 03142, to Simkin M.M. (1944). MIT, MC0760, Box 31.

Model: Box 25.

Video: JD, DSS, “Russian WWII soldier triangle letter, Russia (1944).” Filmed: December 2015. Duration: 1:33. https://youtu.be/wuouh-TDO40. Accessed March 4, 2025.

UH0053, UH0020 envelope (LUV053)

Weronika Gralak's locked letter (UH0053) to Władysława Kerbaczewska in an envelope (UH0020)  (February 14, 1953)


UH0058 (LUV058)

Original and model: Box 31

Video: JD, AL, UHRG, “Triangle format, Japan.” Filmed: December 2015. Duration: 2:08. https://youtu.be/aD9W4EzwH7M. Accessed March 4, 2025.

UH0059 (LUV059)

Original and model: Box 25.

Video: JD, AL, UHRG, “Hexagon format, Japan.” Filmed: December 2015. Duration: 1:59. https://youtu.be/VsPJWfEECig. Accessed March 4, 2025.

UH0060

Original: Elizabeth I’s letter to Sir Ralph Sadler (April 10, 1585).

UH0061 (LUV061)

Original: Empress Maria Theresa of Austria to His Eminence Cardinal Ignazio Boncompagni Ludovisi (December 17, 1775).


UH0063 (LUV063)

Original: Unidentified writer to Vasilev Koryachev (1944).

MIT, MC0760, Box 31.

Model: Box 25.

Video: JD, UHRG, “WWII Russian soldier triangle letter with drawing (1940s).” Filmed: December 2015. Duration: 1:21. https://youtu.be/nz1TMFyhqMs. Accessed March 4, 2025.

UH0064 (LUV064)

Original: Desiderius Erasmus to Bruno Amerbach (November 4?, 1517).

UH0069 with UH4036 (LUV069)

Original: John Smith to Charles Achman (May 24, 1699). Brienne Collection, Sound & Vision The Hague, DB-0799-1-2.

Model: Box 21.

Video: JD, SSU, UHRG, “John Smith’s letter wrapper, France (1699).” Filmed: September 2016. Duration: 4:49. https://youtu.be/Fi113UUKhEI. Accessed March 4, 2025.

UH0070 (LUV070)

Original: Proust to Mlle Proust, France (ca. 1689–1706). Brienne Collection, Sound & Vision The Hague, DB-1590.

Model: Box 21.

Video: JD, SSU, UHRG, “The tiniest undelivered letter, France (1690–1711).” Filmed: September 2016. Duration: 2:12. https://youtu.be/tNJjsxZ31qo. Accessed March 4, 2025.

UH0071 (LUV071)

Original: Gallois to Monsieur Gallois, Commis au Port de Pille (1700). Brienne Collection, Sound & Vision The Hague, DB-0495.

Model: Box 21.

Video: JD, SSU, UHRG, “Diagonal rectangles, France (1695, 1700).” Filmed: September 2016. Duration: 7:04. https://youtu.be/ZTeulVDxpzQ. Accessed March 4, 2025.

UH0072 (LUV072)

Original: The Dagger trap: Simeon Foxe to Sir Robert Cecil, addressed to Thomas Wilson (August 29, 1601).


UH0073 (LUV073)

Original: The slice out lock-SU:Gio. Pietro Sementri to the most Reverend Padre Daniele Rosa (April 23, 1613).

UH0074 (LUV074)

Original: The cut into lock-SA: The Phil Warwick to Sir John Bankes (June 8, 1638).

UH0075 (LUV075)

Original: The internally sliced lock-SA: John Coke to Sir John Bankes (August 23, 1638).

UH0077 (LUV077)

Original: The lock-O written in code: Sir Francis Walsingham to William Harborne (June 24, 1587).

UH0083 (LUV083)

Original: John Keats to Fanny Brawne (1820).

UH0091 (LUV091)

Original: Adriaan Boreel to Mejuffr. Jacoba Sara Boreel (ca. 1689–1706).

Brienne Collection, Sound & Vision The Hague, DB-1308.

Model: Box 21.

Video: JD, SSU, UHRG, “Adriaan Boreel’s pentagonal letterpacket

(1703).” Filmed: September 2016. Duration: 2:46. https://youtu.be/sFkk7EVcnIc. Accessed March 4, 2025.

UH0092 (LUV092)

Original: Isabella Stewart Gardner to Mrs. A. P. Rockwell, Beverly, Massachusetts (late 19th century–early 20th century).

UH0099 (LUV099)

Original: Elisabet Selis to Monsieur Benard (March 9, 1701). Brienne Collection, Sound & Vision The Hague, DB-0018.

Model: Box 21.

Video: JD, SSU, UHRG, “The chapel fold: Elisabet Selis letter to her son, a theater troupe dancer, France (1701).” Filmed: October 2016. Duration: 2:18. https://youtu.be/IJirsuJ9dEk. Accessed March 4, 2025.

UH0100 (LUV100)

Original: Aerogramme, United States Postal Service (1995), MIT, MC0760, Box 31.

Model: Box 27.

Video: JD, UHRG, “Aerogramme, United States Postal Service (1995).” Filmed: September 2016. Duration: 1:57. https://youtu.be/h1JWgT8uKek. Accessed March 4, 2025.

UH0101 (LUV101)

Original: Tatsuo Ohashi 大橋達夫 to Shotaro Ohashi 大橋 勝太郎 (1940s). MIT, MC0760, Box 31.

Model: Box 27.

Video: JD, AL, UHRG, “Aerogramme, Japan (1940s).” Filmed: October 2016. Duration: 3:42. https://youtu.be/w_ln06Y3Wjs. Accessed March 4, 2025.

UH0102 (LUV102)

Original: Cath Kidston fold-and-send stationery (2013) MIT, MC0760, Box 31.

Model: Box 27.

Video: JD, UHRG, “Cath Kidston fold-and-send stationery (2013). Filmed: October 2016. Duration: 1:47. https://youtu.be/3xheG_m2FVg. Accessed March 4, 2025.

UH0103 (LUV103)

Original: Friar John Mowth to John Paston I (May 12, 1466). British Library, Paston Letters and Papers (1440–1489), Additional MS, 43489, fol. 15, Davis number 693.

Model: Box 27.

Video: JD, UHRG, “Friar John Mowth letter to John Paston I, sewn with covered seal, England (1466).” Filmed: December 2015. Duration: 5:47. https://youtu.be/9veKEN9HZyo. Accessed March 4, 2025.

UH0106 (LUV106)

Original: Tomaso di Levrieri to Fra San Piero (January 24, 1590). Vatican Apostolic Archives, Fondo Veneto, Sezione II, 670, folder 1, letter 2.

Model: 15.

Video: JD, UHRG, “Tomaso di Levrieri’s triangle locks and tuck-and-seal, Venice (1586–1590).” Filmed: October 2016. Duration: 13:58. Posted: October 2016. https://youtu.be/Yn6onLVfJ3s. Accessed March 4, 2025.

UH0107 (LUV107)

Original and model: MIT, MC0760, Box 25.

Video: JD, AL, UHRG, “The Nonagon: Japan, Korea, and The Netherlands (1700s–Present).” Filmed: October 2016. Duration: 1:53. https://youtu.be/iSXr7hahndM. Accessed March 4, 2025.

UH0110 (LUV110, LUV301)

Original and model: Accordion fold, MIT, MC0760, Box 3.

Video (LUV110): JD, AL, UHRG, “Accordion fold.” Filmed: October 2016. Duration: 1:53. https://youtu.be/pmJsbYKAL84. Accessed March 4, 2025.

Video (LUV301): HK, UW, JD, UHRG, “Hedi Kyle’s accordion-folding

technique, USA (August 8, 2023).” Filmed: August 8, 2023. Duration: 4:24. https://youtu.be/IrlXX0wX4o8. Accessed March 4, 2025.


UH0115 (LUV115)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Gatefold and closed gatefold.” Filmed: October 2016. Duration: 0:41. https://youtu.be/BlNS6KBeqoA. Accessed March 4, 2025.

UH0116 (LUV116)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Independent folding.” Filmed: October 2016. Duration: 0:46. https://youtu.be/yOL1d-ME9xzk. Accessed March 4, 2025.

UH0117 (LUV117)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Long-edge to long-edge fold.” Filmed: October 2016. Duration: 0:24. URL: https://youtu.be/ev_A6pSf6T8. Accessed March 4, 2025.

UH0118 (LUV118)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Mountain crease.” Filmed: October 2016. Duration: 0:25. https://youtu.be/5HRwjmRSmCE. Accessed March 4, 2025.

UH0119 (LUV119)

Original: Unknown to Monsieur de la Chenais Bellard (ca. 1689–1706). Brienne Collection, Sound & Vision The Hague, DB-2156.

Model: Box 21.

Video: JD, SSU, UHRG, “A partially opened pleated letter, France (1701).” Filmed: November 2017. Duration: 4:18. https://youtu.be/SK5vNnQyCBI. Accessed March 4, 2025.

UH0120 (LUV120)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Epistolary writing substrate parts.” Filmed: October 2016. Duration: 0:42. https://youtu.be/ArQEWXEYg1A. Accessed March 4, 2025.

UH0121 (LUV121)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Roll fold.” Filmed: October

2016. Duration: 0:38. https://youtu.be/GUGp2nabbD4. Accessed March 4, 2025.

UH0122 (LUV122)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Short and long panels.” Filmed: October 2016. Duration: 1:08. https://youtu.be/yZlFh-SXd1o8. Accessed March 4, 2025.

UH0123 (LUV123)

Original and model: MIT, MC0760, Box 3.

Video: JD, UHRG, “Short-edge to short-edge fold.”

Filmed: October 2016. Duration: 0:31. https://youtu.be/FBK7jaw3vcU. Accessed March 4, 2025.

UH0124 (LUV124)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Tandem fold.” Filmed: October 2016. Duration: 0:49. https://youtu.be/vNn4sjbQmIo. Accessed March 4, 2025.

UH0125 (LUV125)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Diagonal fold.” Filmed: October 2016. Duration: 0:49. https://youtu.be/VCXoGgsoJsA. Accessed March 4, 2025.

UH0126 (LUV126)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Valley crease.” Filmed: October 2016. Duration: 0:25. https://youtu.be/c1b1-otwp8Y. Accessed March 4, 2025.

UH0127 (LUV127)

Original: Unidentified author to the city consuls (December 16, 1638). Musée de La Poste, Paris, Vivarez Collection, MO 6048.

Model: Box 29.

Video: JD, UHRG, “A rare spiral lock, France (1638).” Filmed: November 2017. Duration: 5:29. https://youtu.be/1ZRA8KZrNTQ. Accessed March 4, 2025.

UH0128 (LUV128)

Original: Laurens Bidaud to counselors, Saillans (Drôme) (1639). Musée de La Poste, Vivarez Collection, MO 1445.

Model: Box 29.

Video: JD, UHRG, “A spiral lock with seals, France (1639).” Filmed: November 2017. Duration: 7:35. https://youtu.be/Y71DLN3_0oY. Accessed March 4, 2025.

UH0129 (LUV129)

Original: A letter to the Lord of Castelneuf from his nephew (1450s–1500s). Mousel, France (Musée de La Poste), Paris, France, MO 8186.

Model: Box 25.

Video: JD, UHRG, “An early locked paper letter with parchment lock, France (1450s–1500s).” Filmed: November 2017. Duration: 1:41. https://youtu.be/uYCxM3G34UI. Accessed March 4, 2025.

UH0131 (LUV131, LUV180)

Original: Elizabeth I’s spiral locked letter to Henry III, King of France (1570s).

UH0137 (LUV137)

Original: Elizabeth I’s triangle format letter to François, Duc d’Alençon, (1583).

UH0138 (LUV138)

Original: A pinpricked covered seal: A letter written in Armenian (1706). Musée de La Poste, MO8190.

Model: Box 26.

Video: JD, UHRG, “A tuck-and-seal letter written in Armenian, Europe (1706).” Filmed: November 2017. Duration: 4:10. Posted: November 2017.

https://youtu.be/3_PBee6yNUg. Accessed March 4, 2025.

UH0143 (LUV143)

Original: Ch. Aber, S.J., to Monsieur Carneij Dr. en Droit civil (May 3, 1689). Brienne Collection, Sound & Vision The Hague, DB-1910.

Model: Box 21.

Video: JD, NA, SSU, UHRG, “A locked pleated letter (1689).” Filmed: November 2017. Duration: 4:50. https://youtu.be/y18JnA9KpTE. Accessed March 4, 2025.

UH0145 (LUV145)

Original: John de Vere, 13th Earl of Oxford, Lord High Admiral, to John Paston II (July 18, 1469). British Library, Add. MS 43489, fol. 33.

Model: Box 27.

Video: JD, UHRG, “John de Vere’s rolled or folded letter to John Paston II, England (1469).” Filmed: November 2017. Duration: 2:48. https://youtu.be/EwUyTxcuqjY. Accessed March 4, 2025.

UH0147 (LUV147)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Z fold.” Filmed: November 2017. Duration: 0:19. https://youtu.be/oVr_aXVPPFE. Accessed March 4, 2025.

UH0148 (LUV148)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Quartered fold.” Filmed: November 2017. Duration: 0:23. https://youtu.be/mlssBm-1mGbQ. Accessed March 4, 2025.

UH0150 (LUV150)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Crosswise double parallel margin fold." Filmed: November 2017. Duration: 0:58. https://youtu.be/hcXcoIAzv1I. Accessed March 4, 2025.

UH0151 (LUV151)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Dog-ear fold.” Filmed: November 2017. Duration: 0:17. https://youtu.be/4hmvXBKVpEU. Accessed March 4, 2025.

UH0152 (LUV152)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “C fold.” Filmed: November 2017. Duration: 0:25. https://youtu.be/7plu5cP4Tj4. Accessed March 4, 2025.

UH0153

Original: John Hay, telegram partially written in code to unknown recipient, Washington, DC, 1899. Houghton Library, Harvard University, bMS AM 1308, 98.

Model: Box 28.

Video: JD, UHRG, "John Hay’s Coded Telegram, Europe (1899)." Filmed: November 2017. Duration: 2:44. https://youtu.be/OlrUwOa97zg. Accessed March 4, 2025.

UH0156 (LUV156)

Original and model: UH model of Sirius Black to Harry Potter (1994), MIT, MC0760, Box 27. 

Video: EHC, JD, UHRG, “Sirius Black’s locked triangle letter to Harry Potter, England (1994).” Filmed: November 2017. Duration: 4:15. https://youtu.be/NhLon6IGAF8. Accessed March 4, 2025.

UH0157 (LUV157)

Original: Poggio Bracciolini to the Prior of Siena (1455). British Library, Add. MS 21520, fol. 1.

Model: Box 27.

Video: JD, UHRG, “Poggio Bracciolini’s two-piece locked letter, Italy (1455).” Filmed: November 2017. Duration: 3:21. https://youtu.be/T9ueUNUAsOA. Accessed March 4, 2025.

UH0158 (LUV158)

Original: Eduardo Pacis to Pope Clement VII, Portugal (1532). Vatican Apostolic Archive, Principi 7, fol. 347r.

Model: Box 29.

Video: JD, UHRG, “Eduardo Pacis to Pope Clement VII, Portugal (1532).” Filmed: November 2017. Duration: 3:55. https://youtu.be/4WewIT4mnXA. Accessed March 4, 2025.

UH0160 (LUV160)

Original: Hr. W. Proske to Frau F. Schwab, England (June 10, 1918). MIT, MC0760, Box 31.

Model: Box 26.

Video: JD, UHRG. “WWI Prisoner of War Hr. W. Proske’s Letter to Frau F. Schwab, England (1918),” Filmed: November 2017. Duration: 2:48. https://youtu.be/wyOure5ODJg. Accessed March 4, 2025.

UH0161 (LUV161)

Original: Ludwig van Beethoven to Karl Holz (date not known). Houghton Library, Harvard University, bMS Lowell, fol. 20.

Model: Box 25.

Video: JD, UHRG, “Beethoven’s folded letter to Karl Holz, Europe (date not known).” Filmed: December 2017. Duration: 2:26. https://youtu.be/d04hwTPAUiI. Accessed March 4, 2025.

UH0162 (LUV162)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Pushed-in folds.” Filmed: November 2017. Duration: 0:50. https://youtu.be/OjvxUf-GhLRU. Accessed March 4, 2025.

UH0166 (LUV166)

Original: Hendrik Tijnmens to his father Klaes Tijnmens (December 14, 1689). Brienne Collection, Sound & Vision The Hague, DB 2004.

Model: Box 21.

Video: JD, DSS, SSU, UHRG, “A POW letter: A son’s diamond-locked

letter to his father, France (1689).” Filmed: December 2017. Duration: 3:41. https://youtu.be/RX9bxICepJ8. Accessed March 4, 2025.

UH0168 (LUV168, LUV302)

Original: Jane Austen’s holograph letter to Cassandra Austen, Bath, England (May 17, 1799). Houghton Library, Harvard University, MS Eng 870, Box 2 (83A).

Model: Box 27.

Video (LUV168): JD, TL, UHRG, Incorrect fold sequence: “Jane Austen’s signed holograph letter to her best friend and sister, Cassandra Austen, England (1799).” Filmed: January 17, 2022. Duration: 2:51. https://youtu.be/ U3eAEwz35QE. Accessed March 4, 2025.

Video (LUV302): JD, UHRG, Corrected folding sequence: “Jane Austen's roll-folded locked letter to Cassandra, England (1799).” Filmed: April 8, 2024. Duration: 3:05. https://youtu.be/WHO658Plwr0. Accessed March 4, 2025.

UH0169 (LUV169)

Original: Ōtomo Sōrin to his retainer Wakabayashi Danjonojo (August 16, 1569). National Museum of Japanese History, Chiba, Sakura-City, Japan, Call Number H.66.48.

Model: Box 27.

Video: AL, JD, UHRG, “Letterlocking: 切封 Kirifu: Ōtomo Sorin’s, 大友宗麟 letter to his retainer, Japan (August 16, 1569).” Filmed: December 2017. Duration: 3:23. https://youtu.be/Pb99FBWoiHg. Accessed March 4, 2025.

UH0171 (LUV171)

Original: J.G. Herklots to Lieutenant George August Dossit D’Alban (August 25, 5796, Masonic Year). The National Archives, Kew, HCA 30/766.

Model: MIT Libraries: MC0760, Box 26.

Video: JD, DSS, LH, UHRG, “Prize Papers Archive: triangle letterpacket containing an invitation to a meeting of the Masonic Lodge La Vertueuse (August 25, 5796) (Masonic Year).” Filmed: July 2021. Duration: 1:53. https://youtu.be/Iq9wAoHQCfc. Accessed March 4, 2025.

UH0172 (LUV172)

Original and model: MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Parts of a writing substrate: folio.” Filmed: December 2017. Duration: 0:17. https://youtu.be/oy63l0fGMEA. Accessed March 4, 2025.

UH0174 (LUV174)

Original: John Donne to Sir Edward Herbert (January 23, 1615). The National Archives, Kew, PRO 30/53/7/8, fol. 15.

Model: Box 17.

Video: JD, DSS, DF, UHRG, “John Donne’s letter to Sir Edward Herbert, England (1615).” Filmed: November 2017. Duration: 4:10. https://youtu.be/j3NcsTWxBT4. Accessed March 4, 2025.


UH0184 (LUV184)

Original and model: Fold-over lock-SA produced by cutting away, MIT, MC0760, Box 3. 

Video: JD, DSS, UHRG, “Locking mechanism 4: fold-over lock-SA produced by cutting away, USA (2017).” Filmed: December 2017. Duration: 1:25. https://youtu.be/e_0MlulBnEc. Accessed March 4, 2025.

UH0185 (LUV185)

Original and model: Lock-SA fold-over star letterwrapper or wrapper. MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Locking mechanism 5: lock-SA fold-over

star letterwrapper or wrapper, USA (2017).” Filmed: December 2017. Duration: 0:33. https://youtu.be/1XDl_1mJO80. Accessed March 4, 2025.

UH0188 (LUV188)

Original and model: Closure flap: double corner fold + gatefold. MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Locking mechanism 8: closure flap: Double corner fold + gatefold, USA (2017).” Filmed: December 2017. Duration: 1:02. https://youtu.be/FGU82IS7zyA. Accessed March 4, 2025. 


UH0189 (LUV189)

Original and model: Closure flap: gatefold + double corner fold. MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Locking mechanism 9: closure flap: gatefold + double corner fold, USA (2017).” Filmed: December 2017. Duration: 1:09. https://youtu.be/YDZSwp4bciI. Accessed March 4, 2025.


UH0191 (LUV191)

Original and model: Closure flap: gatefold + reverse double corner fold + double corner fold. MIT, MC0760, Box 3. 

Video: JD, DSS, UHRG, “Locking mechanism 11: closure flap: gatefold + reverse double corner fold + double corner fold, USA (2017).” Filmed: December 2017. Duration: 1:47. https://youtu.be/JIlB_f-tWTg. Accessed

March 4, 2025.

UH0192 (LUV192)

Original and model: Gate fold + reverse double corner fold + fold-over.

MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Locking mechanism 12: gate fold + reverse double corner fold + fold-over, USA (2017).” Filmed: December 2017. Duration: 1:10. https://youtu.be/exMvexGKCJw. Accessed March 4, 2025.

UH0193 (LUV193)

Original and model: Closure flap: gatefold + reverse double corner fold + scallop edge closure flap. MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Locking mechanism 13: gatefold + reverse double corner fold + scallop edge closure flap (2017).” Filmed: December 2017. Duration: 1:25. https://youtu.be/xH3TidcYlaw. Accessed March 4, 2025.

UH0194 (LUV194)

Original and model: closure flap: gatefold + pushed-in fold + straddle. MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Locking mechanism 15: closure flap: Gatefold + pushed-in fold + straddle, USA (2017).” Filmed: December 2017. Duration: 1:15. https://youtu.be/MMDpK3NwM_s. Accessed March 4, 2025.

UH0196 (LUV196)

Original and model: Closure flap: gatefold + pushed-in fold + stack. MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Locking mechanism 17: closure flap: gatefold + pushed-in fold + stack, USA (2017).” Filmed: December 2017. Duration: 0:57. https://youtu.be/exGQWE3mycM. Accessed March 4, 2025.

UH0200 (LUV200)

Original and model: Closure flap: gatefold + roll fold + double corner fold + double reverse corner fold. MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Locking mechanism 21: closure flap: gatefold + roll fold + double corner fold + double reverse corner fold, USA (2017).” Filmed: December 2017. Duration: 0:55. https://youtu.be/VEL90iHuyZI. Accessed March 4, 2025.

UH0217 (LUV217)

Original: First-ever virtually unfolded sealed letter: Jacques Sennaques to Pierre Le Pers (1697). Brienne Collection.

UH0218 (LUV 218, LUV253, LUV257, LUV258)

Original: Unknown to Madame Collin (ca. 1689–1706). Brienne Collection, Sound & Vision The Hague, DB-1538.

Model: Box 21.

Video (LUV218): JD, DSS, SSU, UHRG, “A virtually unfolded letter to Madame Collin at the home of Monsieur Harlan, tax collector, France (ca. 1689–1706).” Filmed: July 2021. Duration: 1:39. https://youtu.be/lSRVIrqtL5M. Accessed March 4, 2025.

Video (LUV253): AG, “Virtual Reality: Announcing a world first! Virtual unfolding a sealed letter from the Brienne Collection (DB-1538)!” Filmed: October 2020. Duration: 0:06. https://youtu.be/_awvL2O4PVY. Accessed

March 4, 2025.

Video (LUV257): AG, “XMT scan animation exploded view of letterpacket layers from the Brienne Collection (DB-1538).” Filmed: October 2020. Duration: 0:20. https://youtu.be/2Jli57X5_6k. Accessed March 4, 2025.

Video (LUV258): AG, “Virtual unfolding: growing and flattening animation of an unopened letter from the Brienne Collection (DB-1538).” Filmed: October 2020. Duration: 1:17. https://youtu.be/g4HQQ8FAerQ. Accessed March 4, 2025.

UH0219 (LUV219)

Original: Unknown sender to Madame de Morlain (1690–1724). Brienne Collection, Sound & Vision, The Hague, 46, DB-1976

Model: Box 21. 

Video: JD, DSS, SSU, UHRG, “A virtually unfolded letter to Madame de Mesgral from De Morlaix in Brittany to The Hague, France (ca. 1689–1706).” Filmed: July 2021. Duration: 3:07. https://youtu.be/mc7Wkn5uKvw. Accessed March 4, 2025.

UH0220 (LUV220)

Original: A nonagon letterpacket sent to the attention of Lieutenant D’Alban relating to a Masonic suitcase, (1798).

UH0221 (LUV221)

Original: A triangluar letterpacket: Unknown to unknown (date not known).

UH0223

Original: John Donne to William Trumbull (September 10, 1614). British Library, Add. MS 72346, fol. 57r. 

Model: MIT Libraries: MC0760 Box 17.

UH0224 (LUV224)

Original: A spiral lock-SA letter: Catherine de’ Medici to Raimond de Beccarie, Monsieur de Fourquevaux (1570). MIT Libraries, DC111.A2 C38 1570.

UH0225 (LUV225)

Original and prop model: A trick letter found by Shakespeare’s Malvolio (2019). MIT, MC0760, Box 18.

UH0227 (LUV227)

Original: An independently roll-folded letter: Ms. Phillis Wheatley to Ms. Obour Tanner (May 6, 1774).

UH0228 (LUV228)

Original and model: Pagu big heart. MIT, MC 0760, Box 25.

Video: JD, DSS, TC, UHRG, “Pagu big heart, USA (2017).” Filmed: January 9, 2022. Duration: 0:59. https://youtu.be/rpVqkN9RtrM. Accessed March 4, 2025.

UH0230 (LUV230)

Original: Maaggriet Opper to Willem Bauest Jagger (1777 and 1821). Doesburg Collection, Sound & Vision The Hague, DB-00045–597.

Model: Box 27.

Video: RV, JD, UHRG, “Fascinating flaps: Maaggriet Opper’s letter to her husband Willem Bauest Jagger (1777 and 1821).” Filmed: July 30, 2021. Duration: 4:04. https:// youtu.be/5nOVKq9yz8M. Accessed March 4, 2025.

UH0231 (LUV231)

Original: Burgetta Quack to Johannes Elderveld (ca. 1800). Doesburg Collection, Sound & Vision The Hague, DB-00045–684.

Model: Box 27.

Video: RV, JD, UHRG “Fascinating flaps: Burgetta Quack’s letter to Johannes Elderveld, The Netherlands (1800).” Filmed: July 30, 2021. Duration: 3:22. https://youtu.be/fUIyYP6BLYs. Accessed March 4, 2025.

UH0232 (LUV232)

Original: Unknown to unknown. A pentagonal letterpacket (October 25, 1783). Musée de La Poste, MO 900. 11.

Model: Box 27.

Video: JD, DSS, UHRG, “A pentagonal letterpacket, France.” Filmed: January 17, 2022. Duration: 2:38. https://youtu.be/iIVPalZl36A. Accessed March 4, 2025.

UH0233 (LUV233)

Original and model: Locking mechanism 14: closure flap: 60 degree double corner folds, USA (2021). MIT, MC0760, Box 3.

Video: JD, DSS, UHRG, “Locking mechanism 14: Closure flap: 60 degree double corner folds, USA (2021).” Filmed: July 31, 2021. Duration: 1:07. https://youtu.be/pMGHly5QYJU. Accessed March 4, 2025.

UH0239 (LUV239)

Original: Edgar Allen Poe to Charles Astor Bristed, New York (June 7, 1848). Harry Ransom Center, The University of Texas at Austin, Edgar Allan Poe Collection, MS-03283. Model: Box 26.

UH0248 (LUV248)

Original and model: Prop model of Jessica’s letter to Lorenzo in Shakespeare’s Merchant of Venice. MIT,MC0760, Box 18.

Video: JD, DSS, UHRG, “Shakespeare props, Merchant of Venice, Jessica to Lorenzo: ‘do it secretly’.” Filmed: July 31, 2021. Duration: 4:02. https://youtu.be/tIxinKSyi_I. Accessed March 4, 2025.

UH0254

Original: John Donne to Sir Thomas Egerton (February 2, 1602). Folger Shakespeare Library, L.b. 526. Model: Box 17.

UH0381

Original: Hassan El-Masri to the Devine Brothers, Egypt (May 24, 1944). MIT, MC0760, Box 32.

UH0384

Original: Japanese military lettersheet, unused (ca. 1940s). MIT, MC0760, Box 31. Model: Box 27.

UH0385

Original: Letter sent from Messina to Firenze, Italy (1618). MIT, MC0760, Box 31. Model: Box 27.

UH0392

Original: Mr Chordan to Giuseppe Sonnino, Egypt (1843). MIT, MC0760, Box 32. Model: Box 27.

UH0405

Original: Ship captain to the Council of Ten, Venice (March 25, 1540). MIT, MC0760, Box 32.

UH0408

Original: A locked letter to Isabel Downing, Pennsylvania (1930). MIT, MC0760, Box 32.Model: Box 27.

UH0414

Original: Costanzo Baitelli to Hieronimo Nigribono, Piacenza (1570). MIT, MC0760, Box 33.

UH0423

Original: US lettersheet sent to David G. Lewis (1887). MIT, MC0760, Box 33.

UH0490

Original: Marie Antoinette to Cardinal Ignazio Boncompagni Ludovisi (January 31, 1778). Archivio Boncompagni Ludovisi (Villa Aurora). Model: Boxes 25 and 52.

UH0490

Original: Marie Antoinette to Cardinal Ignazio Boncompagni Ludovisi (January 31, 1778). Archivio Boncompagni Ludovisi (Villa Aurora). Model: Boxes 25 and 52.

UH0492

Original: A removable lock-o: Marie Antoinette to Cardinal Ignazio Boncompagni Ludovisi (January 31, 1780).

UH0513

Original: Elizabeth I letter to John Erskine, Earl of Mar and Regent of Scotland (September 6, 1572), cover art for Magg’s Bros Limited Catalogue 1427, Autograph Letters and Documents (London: Purely Print, 2008).

Model: Box 16.

UH0523

Original: Elizabeth I to James VI (January 1587). British Library, Add. MS 23240, fols. 57v–58r. Model: Box 16.

UH0593

Original: Royal commission from Elizabeth I to George Talbot, 6th Earl of Shrewsbury (January 16, 1580). British Library, Add. MS 33,594, fol. 5. Model: Box 16.

UH0594

Original: Royal commission from Elizabeth I to Sir John Zouche (January 16, 1580). British Library, Add. MS 33,594, fols. 6–7. Model: Box 16.

UH0595

Original: Royal commission from Elizabeth I to George Nevell (January 16, 1580). British Library, Add. MS 33,594, fols. 8–9. Model: Box 16.

UH0596 (LUV060)

Original: Royal commission from Elizabeth I to Francis Hastings (January 16, 1580).

UH0711

Original: Mary, Queen of Scots, to Sir William Cecil (May 19, 1567). Hatfield House, Cecil Papers, CP.133.62.

UH0890

Original: Caterina Sforza to Ludovico Sforza, Imola (December 18, 1477). White Collection of Italian Renaissance documents, Morgan Library and Museum, MA.2691.12. Model: Box 28.

UH0895

Original: Henry VIII’s writ and subpoena to Sir William Troutbek, Richmond (May 26, no year). British Library, Add. MS 46454, fol. 26r–v. Model: Box 28.

UH0959

Original: Martin I, King of Aragon to Louis, Duc of Orleans (May 22, 1404). Houghton University, Harvard University, Box 1, MS Typ 762.Model: Box 28.

UH1018

Original: Handmade Chancery paper, University of Iowa

Center for the Book (UICB).

Model: Box 54.

UH1034

Original: Mary, Queen of Scots to Bertrand de Salignac de la Mothe-Fénelon (February 20, 1574). Harry Ransom Center, HRC 56. Model: Box 16.

UH2974

Original: Unknown to Du Manier, Louison, (1699). Brienne

Collection, Sound & Vision, The Hague, DB-0017.

Model: Box 21.

UH3021 (letterwapper containing UH3022)

Original: F. Guynier to Cuyper (August 4, 1698). Brienne Collection, Sound & Vision, The Hague, DB-0054–1, DB-0054–2. Model: Box 21.

UH3022 (inserted inside letterwapper UH3021)

Original: F. Guynier to Monsieur Hill (August 5, 1698). Brienne Collection, Sound & Vision, The Hague, DB-0054–3; DB-0054–4; DB-0054–5. Model: Box 21.

UH3302

Original: Unknown to Monsieur Brandon Merchand, Brienne

Collection, Sound & Vision, The Hague, DB-0259.

UH3450

Original: Unknown to Malhier (ca. 1689–1706). Brienne Collection, Sound & Vision, The Hague, DB-0366a-1, DB-0366a-02. Model: Box 21. 

UH4702

Original: Keys to substrate maps, step-by-steps, and overlays, 2024. Model: Box 1.

UH6021

Original: J. de la Ruce to M. de Traveci (ca. 1689–1706). Brienne Collection, Sound & Vision, The Hague, DB-10021–02. Model: Box 21

UH6073

Original and model: Brien Beidler’s octagonal letter to Jana Dambrogio (2016). MIT, MC0760, Box 32.

UH6076

Original and model: Ayako Letizia shirt-shaped letter to

Jana Dambrogio (2016). MIT, MC0760, Box 32.

UH6077

Original: Hexagon criss-cross format letterpacket. The National Archives, Kew, The Prize Papers, HCA 30/766.

Model: Box 25.

UH6078

Original: Pentagon criss-cross format letterpacket. The National Archives, Kew, The Prize Papers, HCA 30/766.

Model: Box 25.

UH6079

Original: Heptagon criss-cross format letterpacket. The National Archives, Kew. The Prize Papers, HCA 30/766.

Model: Box 25.

UH6083

Original and model: Hexagon pouch letterpacket. MIT, MC0760, Box 25.

UH6084

Original and model: Origami star (2014). MIT, MC 0760, Box 25.

UH6087 (LUV268)

Original: Unknown to unknown, Valentine Puzzle Purse (1826). The Metropolitan Museum of Art, 1981.1136.178.

Model: Box 25.

Video: JD, DSS, UHRG, “Valentine puzzle purse, England or USA (1826).” Filmed: July 30, 2021. Duration: 1:17. https://youtu.be/VVxzg4B5lmA. Accessed March 4, 2025.

UH6089 (LUV263)

Original: Letterlocking categories and formats chart, 2021.

Model: Box 1.

Video: JD, DS, UHRG, “Unlocking History’s Launch Little Book of Locks (2021).” Filmed: July 30, 2021. Duration: 2:49. https://youtu.be/6u9Kq-kmkmE. Accessed June 1, 2024.

UH6090

Original: Giovanni Runco to the management of the Ritmeier [Institute for the Blind], in Braille, Italy (March 22, 1930). MIT, MC0760, container 32.v Model: Box 33.

UH6100 (LUV226)

Original and model: Pagu Small Heart (2017). MIT, MC 0760, Box 55.

UH6108

Original and model: Pakistan aerogramme, unused (1969). MIT, MC0760, Box 33.

UH6132

Original: Dietrich Hoerner to Heinrich Schelt, Hanseatic merchant in the Steelyard in London; German (1533),

UH6142

Original: Jheronnimus to his brother Jasper, in Dutch (1533).

UH6165

Original: Ludwig van Beethoven to Johann Baptist Rupprecht (ca. 1814). Houghton Library, Harvard University, MS Eng 870, (79B).

Model: Box 54.

UH6171 (LUV287)

Original: Romare Bearden to Billie Allen (1979). Walter O. Evans, MD, and Linda J. Evans, private collection.

UH6172

Original. Letter from Toussaint Louverture. Walter O. Evans, MD, and Linda J. Evans, private collection.

UH6180 (letter) (LUV291)

Original: Emily Dickinson to W. Austin Dickinson (December 11, 1847).

UH6181 (LUV286)

Original: Ira Aldridge to Sir MacDonnell, Ireland (1835).

UH6194 (LUV295)

Original: Henri Christophe to Toussaint Louverture (1802).

UH6199

Original: Phillis Wheatley to Obour Tanner (March 21, 1774). Massachusetts Historical Society.

Model: Box 54.

UH6203

Original: Letterlocking categories and formats chart, updated 2023.

UH6211 (LUV297)

Original: Josephine Baker to Margaret “Meg” Martin Wallace, France (November 1, 1938). Collection of the Smithsonian National Museum of African American History and Culture, 2010.36.14.

Model: Box 28.

UH6214

Original: Sir Isaac Newton to Robert Hooke, Woolstrope, Lincolnshire, England (May 18, 1678). Morgan Library and Museum, MA1064.4.

Model: Box 54.

UH6215

Original: Bess of Hardwick to unknown (December? 1573). The National Archives, Kew, SP 12/93, fol. 102r-v.

Model: Box 54.

UH6216

Original: Letter of Credence appointing Anson Burlingame as Envoy Extraordinary and Minister Plenipotentiary for China to the United States (ca. 1867). US National Archives and Records Administration, Record Group 59: General Records of the Department of StateSeries: Ceremonial

Records Relating to China, NAID: 147969846.

UH6233

Original and model: Brienne diamond sealed with a heart rainbow sticker.

Model: Box 54

UH6237

Original: King Eyo Honesty II to a British captain (1842–1845). Smithsonian National Museum of African American History and Culture, 2018.46.8.4.

Model: Box 54.

UH6241

Original: Jane Austen to Cassandra Austen (October 14, 1813). Houghton Library, Harvard University, Ms Lowell Autograph file (17).

UH6242

Original: Locked model giveaway (March 16, 2014). MIT, MC0760, Box 26.

UH6245

Original: United Nations Aerogramme (ca. 1941–1960), 10-cent stamp. MIT, MC0760, Box 54.

UH6246

Original: Book of models documenting conservation repairs and typical damage found on locked letters (June 2013). MIT, MC0760, Box 38.

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