I'm sure you all have seen it but this was the benchmark comparison 20 years ago:
VIENNA, NATIONALBIBLIOTHEK, Cod. Vindob. 2398.
Franciscus Tranchedinus,
Furtivae litterarum notae .
This codex contains some two hundred ciphers
used by the Milanese Chancery
between 1450 and 1496. Ciphers shown date
from ca.1450. Original .
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Marco, Plants of the Alchemists thread
But to quote Rene:
"Even down to such special things as Currier 'S', the i-shaped variant of Currier-S, 'SO' ligatures, picnic tables, and things like the 'chinese hat in corner', looking more like the mirror image of Arabic 'k'."
Have we progressed much in the last 20 years?
Also this:
from the same thread.
I thought this all may be interesting and somewhat relevant but please delete if not.