Binding: Contemporary Spanish limp vellum with contemporary or early bold MS spine lettering ‘Mechanicor. Guidi. Ubald[i]’, the end of the title obscured by an old paper shelf label with MS number 84, overwritten with another shelf-mark, ‘I.B.I.G.’ Front endleaf
Provenance: 1. Probably a student of Julio Cesar Ferrufino (c. 1535–1604) at the Real Academia de Matemáticas de Madrid, contemporary inscription on front free endleaf ‘Don felipe tercero de Austria’ (Lord Philip III of Austria) / ‘Protector eres de la fe divina’ (Hereditary protector of the divine faith). The first line is used as the key to an alphanumeric code with sequential numbering 1–25 beneath the letters of the first line; the second line is then used as a plaintext with the numerical ciphertext written below; substantial marginal annotations in same hand on some 20 leaves, including corrections to text and diagrams, calculations, etc; annotator’s monogram or paraph on dedication leaf [cross]2r (twice), signing an emendation to an annotation referring to Ferrufino on 126v and, perhaps a different mark, at end of text on 130v. 2. Unidentified library, bookplate removed, shelfmarks on spine. 3. Sotheby’s New York, 11 December 2009, lot 202.
Guidobaldo at the court of Philip II.