1806 Popham Telegraph Signals
Signal Flags
253 269 863 261 471 958 220 370 4 21 19 24
england expect that every man will do his d u t y
duty not in signal book

Uses 12 hoists of at most 3 flags.

Use telegraphic flag (at beginning)
Use finish flag (at end)
Use substitute flag (for second of two consecutive digits)
flag ratio 1:1
flag ratio 1:2
flag ratio 2:3
flag width (pixels)
v.1.1