Nineteen bindings are now recorded with the impresa of a serpent entwined around a key, with motto “Scilicet is superis labor est” (For sure, this is work for gods - Vergil, Aeneid, 4.379), stamped in gold in the centres of both covers. Inside are books in Latin printed between 1517 and 1566, at Basel, Cologne, Florence, Lyon, Mondovì, Paris, and Venice, with Lyonese and Venetian imprints predominating. Two stamps were made, one (66 x 48 mm) for duodecimos and octavos, the other (91 x 68 mm) for books in quarto and folio format. The decoration is restrained: on the larger books, a frame composed of multiple gilt lines, with either a fleuron or fleur-de-lys at the corners; on the smaller ones, a frame containing foliage, with the same fleur-de-lys in corners. Red goatskin is employed for modern authors, olive or brown goatskin for ancient authors and ancient subjects. Each volume has a title lettered in the upper compartment, or vertically down the spine, suggesting how the books were displayed in their owner’s library.