Useful Exercise?

[Mark Knowles]

Logically I would look for similarities to the 1424 Milanese cipher and similarities to the 1447 Milanese ciphers. However it is possible that it has features not seen in either of these. Alternatively it may turn out that it is much more similar to the 1447 Milanese ciphers than it is to the 1424 Milanese cipher or vice versa. Still, it is a data point in the evolution of early 15th century ciphers.