Caissa Limited editions volume IV, Yorklyn,DE, 1984, hardback, lxi+184p., blue cloth with gilt lettering to cover and spine, fine condition, 432 grams. Copy no 360 of 700 (see photo). Edited and translated by Christopher Becker. After a hitherto unpublished manuscript owned by the Cleveland Public Library, USA. Limited edition, of which only 700 copies were for sale.

Written around 1800 and ready for the print, this manuscript has remained unpublished until the present day. In the 1840's the great reputation of the "Anonymous Modenese", as del Rio was called, made the manuscript much sought after, and Borsari, its owner, lurks mysteriously in the background of one of Willard Fiske's chess tales. But its contents remained a mystery, and modern chess developed without their help, though not with out help from the already published works of del Rio and the other masters of Modena, Lolli and Poziani.