De occulta parte numerorum, quam algebram vocant, libri duo
Paris: Guillaume Cavellat, 1560. 4to. [iv], 62, [6] ff. (61,62 misnumbered 56, 57), including the final errata leaf. Lovely printer's device on title, illustrated and decorated initials, text diagrams. Contemporary vellum; apart from a worm trail running through the lower blank inner margin and minor age browning, a generally good..... More