Purchased from Vollbehr, March 23, 1925. Ms. annotations in several 16th century Spanish hands, some cropped, including keywords, chapter summaries, corrections, calculations, drawings, reading marks, pen trials and manicules. Biographical note about the author on final page. A few signatures “Amaya” (C8r), “Francisco Fernandez de los” (L8v), “Fernado su[?] Movellan” (M2r) with a cross of Saint James, and “Bernabe de Mor […]” (M6r).