Unlocking History number (UH#)
UH0016
Original
Lucy May Schofield's "Pis'ma-treigol'niki = Letters of triangles, MIT Libraries, Unlocking History Research Group archive, MC0760, Box 31.
Model and research notes
MIT Libraries, Unlocking History Research Group archive, MC0760, Box 25.
Letterlocking Unique Video number(s) (LUV #s) & Instructional video(s) URL
LUV016 https://youtu.be/C8FehD2EE0U
Instructional video info transcription
Forthcoming
Letterlocking Category number (LC #)
LC02Z
Letterlocking Format number (LF #)
3T
Security score
Zero
Assessment of Confidence in assigning LC#
Attested
Substrate
Paper
Dimensions
Opened (in mm): 230 mm x 170 mm
Letterpacket (in mm): 90 mm x 180 mm
Manifestation
Opened
Distinctive letterlocking style(s)
Triangle-shaped letterpacket
Contemporary artists’ book
Locking mechanism
Tuck
Security enhancements
NA
Letterlocking category formula (shorthand)
Fold + Tuck
(F + T)
Letterlocking manipulation sequence (shorthand)
Fold + fold + fold + fold + fold + tuck
Locking instructions
Lay two layers of substrate on top of each other —paper and tracing paper. Top corner fold so that the entire top short edge aligns with the top part of the left long edge. Keep folded. Top left diagonal fold. Keep folded. Bottom right corner fold. Keep folded. Bottom left corner fold. Keep folded. Tuck bottom multi-panel flap into the triangular-shaped pocket.
Images
Forthcoming
Foldable(s)
Forthcoming
Step-by-steps
Forthcoming
Substrate map
Forthcoming
Virtual unfolding results
NA
Manipulations
Writing: NA, Letterpress printed
Postal: NA
Opening: NA
Filing (Storage, Display): NA
Repair: NA
Damage
NA
Features
NA
Article(s)
NA
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)
Original
Lucy May Schofield’s artist book, “Pis’ma-treigol’niki = Letters of Triangles (2013).” MIT Libraries, SMALL N7433.4.S36 P57 2013.
Model
MIT Libraries, Unlocking History Research Group archive, MC0760, Box 25.
Video
Lucy May Schofield, Jana Dambrogio, and the Unlocking History Research Group, ‘Lucy May Schofield’s ‘Pis’ma-treigol’niki = Letters of Triangles,’ England (2013).” Letterlocking Instructional Videos. Unlocking History number 0016/Letterlocking Unique Video number: 016. Filmed: June 2014. Duration: 0:22. Posted: June 2014. https://youtu.be/C8FehD2EE0U. Accessed: March 4, 2025.