Chancery folio (306 x 205 mm). Collation: a-i6 k4 (a1r title, a1v blank, a2r text and with commentary surround, k4r colophon, quire register, k4v blank). 58 leaves. 44 lines and headline. Type: 1:80R, 3:108R. Woodcut white-on-black and outline historiated initials. (Some minor spotting, light mostly marginal dampstain to several leaves.) Later vellum. Provenance: a few marginal annotations in an early hand; Marchese Maurizio Burlamacchi (1930-2016), Italian bibliophile (bookplate). 

Fourth edition with this commentary.  RARE: according to online records, only one copy of this work has appeared on the market at auction since the 1940s (the Foyle copy, Christie's New York, 11 July 2000, lot 151, that copy sold again Sotheby's, 3 October 2002, lot 71). Not in BMC; Goff C-639; GW 6898; ISTC ic00639000 (recording only three copies in the United States).