Unlocking History number (UH#)
UH0077
Original
Sir Francis Walsingham’s Triangle-locked Letter Written in Code, England (1587)
Model and research notes
MIT Libraries, Unlocking History Research Group archive, MC0760, Box 16.
Letterlocking Unique Video number(s) (LUV #s) & Instructional video(s) URL
LUV077 https://youtu.be/HFbrYa5okjw
Instructional video info transcription
Forthcoming
Letterlocking Category number (LC #)
LC15L
Letterlocking Format number (LF #)
4RW
Security score
Low
Assessment of Confidence in assigning LC#
Attested
Substrate
Paper
Dimensions
Opened (in mm): 310mm x 220mm
Letterpacket (in mm): 80mm x 112mm
Manifestation
Opened
Distinctive letterlocking style(s)
Triangle lock-O
Locking mechanism
Closure flap, Lock, Hybrid-lock, Tuck
Security enhancements
Authenticated exposed seal
Codes and ciphers
Fake security
Steganography
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
Losses along the edges
Features
Dirt on panels/ in crease
Radiating wrinkles
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)
UH0077
Original
Sir Francis Walsingham to William Harborne England (June 24, 1587). University of Oxford, Bodleian Libraries, MS Tanner 79, fols. 127/128.
Model
MIT Libraries, Unlocking History Research Group archive, MC0760, Box 16.
Video
LUV077
Jana Dambrogio and the Unlocking History Research Group, “Sir Francis Walsingham’s Triangle-locked Letter Written in Code, England (1587).” Letterlocking Instructional Videos. Unlocking History number 0077/Letterlocking Unique Video number: 0077. Filmed: September 2016. Duration: 3:36. Posted: October 2016. URL: https://youtu.be/HFbrYa5okjw. Accessed: March 4, 2025.