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Letterlocking: A tiny attached lock, France (1598) (UH0139)
00:03:50
Letterlocking: Aerogramme, United States Postal Service (1995) (UH0100)
00:01:57
Ira Aldridge’s folded letter (no date) (UH6193, LUV292)
John Brown’s folded letter to his brother and his sister Adair, 1859 (Ohio, USA) (UH6174)
00:01:13
Sword Lock: Letter from Gio. Pietro Sementri to the most Reverend Padre Rosa, Italy (1613) (UH0073)
00:04:05
A spiral-locked letter written in code by John Chisholme, London (6 and 24 February 1571) (UH0136)
00:06:29
Letterlocking: John Donne's pleated letter to Sir Robert Harley, England (1613) (UH0031, LUV093)
00:04:38
Letterlocking: René Milleran’s independently folded "tuck-and-seal," France (1690, 1742) (UH0068)
00:03:03
Uncle Derchey’s tucked, locked, and sealed cautionary tale, France (1699) (UH0096)
00:04:21
Brienne Postal Archive: A two-piece locked letter from Cosimo III de' Medici, Italy (1701) (UH0164)
00:05:25
Brienne Postal Archive: A letter to the Count of Argenson, France (1689) (UH0175, UH5371)
00:02:29
Daddy can't pay your debts forever!: A locked letter, France (1706) (UH0098)
00:02:22
Brienne Postal Archive: Adriaan Boreel’s pentagonal-shaped letterpacket (c.1703) UH0091
00:02:47
11-year-old Emily Dickinson's roll-folded locked letter to her brother, USA (May 1, 1842)
00:03:19
Surprise: It's Happening! Letterlocking: The Hidden History of the Letter. Pub date: March 4, 2025
00:01:51
Corrected folding sequence: Jane Austen's roll-folded locked letter to Cassandra, England, (1799)
00:03:05
Ludwig van Beethoven's pentagonal letterpacket to Johann B. Rupprecht Europe (ca. 1814) (UH6165)
Henri Christophe’s tuck-and-seal letter to Toussaint Louverture’ Haiti (1802)
00:01:29
Phillis Wheatley’s tuck-and-seal locked letter to Obour Tanner, USA (July19, 1772)
00:02:31
Hedi Kyle's accordion-folding technique, USA (August 8, 2023)
00:04:25
Phillis Wheatley’s rolled, tuck, and seal letter to Obour Tanner, USA (1774) (UH0227)
00:02:37
Jana and Terra from MIT’s Wunsch Conservation Lab on Nick Sikellis's The Intangible Podcast  (2023)
00:39:32
Did the independent folds of Ira Aldridge’s letter once contain an insert? Ireland (1835) (UH6181)
00:03:39
Triangle-shaped Masonic Lodge meeting invitation, La Vertueuse, 25 August 5796 (UH0171)
00:01:54
Lieutenant D'Alban, a nonagon-shaped letterpacket, & a Masonic suitcase, 1798 (UH0220)
00:02:09
Message in a Bottle: Liesbet Raens’ undelivered letter to her husband, Antwerp (1533) (UH6127)
00:05:37
Malta Notarial Archives: A letter written in Moroccan dialect, Malta (date unknown) (UH0221)
00:01:53
Letterlocking: Love bug – numbered foldable version, USA (2020) (UH0038)
00:04:59
Incorrect fold sequence: Jane Austen’s signed letter to Cassandra Austen, England (1799) (UH0168)
00:02:51
Brienne Collection: A virtually unfolded letter to Madame Collin, France (c.1690–1720) (UH0218)
00:01:40