De fvrtivis literarvm notis, vulgo, De ziferis libri IIII
A 1563 Neapolitan cryptography treatise by Giambattista della Porta, printed in Naples for a scholarly readership, on secret letter signs and ciphers. Its pictures are woodcut-style decorative strapwork bands, panels of geometric cipher symbols and cross-like marks, and scrolled ornamental borders, which a designer could use for frames, dividers, or cipher-inspired pattern.
