Signal book

Alphabets where every letter is a picture: ship's flags, semaphore, ogham, braille shapes and tap code. No secret here, only the chart; the pleasure is in how they draw.

Starting points

Message Say Classical cipher first Cipher key

Alphabet Alphabet Layout Letter under each glyph Empty dot places Largest glyph (mm)

Colour Colours drawn as Pitch (mm) Angle for pen colours (deg)

Heraldic hatching (the Petra Sancta system, 1638): red vertical lines, blue horizontal, yellow dotted, black crosshatched, white bare. A pen per colour writes one layer per colour for coloured pens.

Caption Below Letter height (mm) Text pen preview

Paper Page Machine marks (for the camera decoder) Mount window, mm in from the edge (for "under a mount") Corner ticks

drawing

Flags after the International Code of Signals; semaphore after the standard two-flag alphabet, drawn as seen by the reader; ogham after the twenty letters of the four aicmí; braille grade 1 cells. Normalizing and the optional classical ciphers come from UNRAVEL THE PURLOINED (commit dev).