Excerpt from Cryptography or the History, Principles, and Practice of Cipher-Writing
Message wrapped Round a Ruler
Ditto Illegible through Use of Wrong Ruler
Message Unwrapped from Roller
Divided to show Facility for Detection
Better Method of Roller Form of Message
Message of No. 5 Unrolled
Mason-marks from Ancient Buildings
The "Revolving Disk" Cipher
Modification of Fig. 8 for Straight Edge
The "Bead" Cipher
The "String" Cipher
Elizabethan Arbitrary Symbols for Letters
The "Noughts and Crosses" Cipher
The "Noughts and Crossses": Key Changed
The "Grille": Pierced Card
The "Grille": Message Read through Openings
The "Grille": Message as Sent off
The "Revolving Grille" Form of Cipher
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