De amicitia (MS M.882).

Executed for Cardinal Raphael Riario (1451-1521, his arms on fol.1: per fess azure and or, a cinquefoil or on the first, surmounted by a cross and red hat; his devices: the rudder of a galleon, a bunch of flowers, a pair of doves; mottoes: Sola mors, Sic perpetuo (?), Hoc opus, Humana Fluctuant); owned in the 19th century by "a certain Gutenberg archdeacon whose name is inscribed on fol. 42" [this according to binder description; the inscription is barely legible under UV light]; Prince Lichnowsky Library (crowned monogram BPL in lower right corner of fol. 42); Sotheby's sale (London, 20 June 1900, lot 32); Sotheby's sale (London, 11 December 1956, lot 10); gift of Mr. William S. Glazier, December, 1956.