De furtiuis literarum notis
Subtitle: vulgo. de ziferis libri IIII
By: Ioan. Baptista Porta Neapolitano autore
Series: Early English books online
Publisher: Cum priuilegio Londini, apud Iohannem Wolphium
Published: 1591
Place of publication: London
Language: lat
Number of pages: 228
Subjects: Cryptography; Early works to 1800; Ciphers
Other titles: De furtivis literarum notis; De ziferis.; De furtivis literarum notis vulgo. de ziferis libri IIII.; De fur. lit. not.; De fvrtivis literarvm notis vulgo de ziferis libri IIII; De fur. lit. not.
Notes: Editor's dedication to Henry Percy, Earl of Northumberland, signed: Iacobus Casteluitrius.

Includes three volvelles, the moving parts of which were printed together on a separate quarter-sheet.

Running title reads: De fur. lit. not. ..

Another state (STC 20118a) has false imprint "Neapoli, apud Ioa. Mariam Scotum. MDLXIII" and a different dedication to Joannes Sotus.

STC (2nd ed.) 20118.

Shulman, D. Cryptography, p. 4

ESTC S101179

The plate, here inserted at p. 73, contains 3 volvelles probably intended to be cut out & attached to the figures on p. 73, 79, & 83.