Unlocking History number (UH#)
UH0157
Original
Poggio Bracciolini’s two-piece locked letter, Italy (1455)
Model and research notes
MIT Libraries, Unlocking History Research Group archive, MC0760, Box 28.
Letterlocking Unique Video number(s) (LUV #s) & Instructional video(s) URL
LUV0157 https://youtu.be/T9ueUNUAsOA
Instructional video info transcription
Forthcoming
Letterlocking Category number (LC #)
LC15L
Letterlocking Format number (LF #)
4RW
Security score
Low
Assessment of Confidence in assigning LC#
Inferred
Substrate
Paper
Dimensions
Forthcoming
Manifestation
Opened
Distinctive letterlocking style(s)
Two-piece lock
Locking mechanism
Lock
Security enhancements
Forthcoming
Letterlocking category formula (shorthand)
LC15
Fold + Slit/Hole + Adhere + Lock-O
(F + S/H + A + LO)
Letterlocking manipulation sequence (shorthand)
Forthcoming
Locking instructions
Forthcoming
Images
Forthcoming
Foldable(s)
Forthcoming
Step-by-steps
Forthcoming
Substrate map
Forthcoming
Virtual unfolding results
NA
Manipulations
Forthcoming
Damage
Tears
Ink Corrosion
Trimmed
Features
Dirt on panels/ in crease
Article(s)
2023. Daniel Starza Smith & Jana Dambrogio. Letterlocking: securing correspondence before envelopes in Routledge Encyclopedia of the Renaissance World. Lauren Shohet, subject editor.
Book
Jana Dambrogio and Daniel Starza Smith with the Unlocking History Research Group. Letterlocking: The Hidden History of the Letter. Cambridge and London: MIT Press, 2025.
Citation for the letter(s)
UH0157
Original
Poggio Bracciolini’s two-piece locked letter, Italy (1455), British Library, Add. MS 21520, fol. 1.
Model
MIT Libraries, Unlocking History Research Group archive, MC0760, Box 28.
Video
Jana Dambrogio, Daniel Starza Smith, and the Unlocking History research group. "Poggio Bracciolini’s two-piece locked letter, Italy (1455),” Letterlocking Instructional Videos. Unlocking History number 0157/Letterlocking Unique Video number: 0157. Filmed: November 2017. Duration: 3:21. Posted: January 5, 2018. URL: https://youtu.be/T9ueUNUAsOA. Accessed March 4, 2025.