40001316, Poniatowski, 1839-74, VENUS, HEAD, VERY DEEPLY CUT [HEAD OF IO; THE HEAD OF ISIS], DIOSKOURIDOU, Dioskourides, Unknown, Cook, A.B.: Zeus a Study in Ancient Religion (1925), King, C.W.: Antique gems: their origin, uses, and value as interpreters of ancient history; and as illustrative of ancient art: with hints to gem collectors (1860), Daktyliothek Poniatowski 1832, Antikensammlung Berlin, Catalogue des pierres gravées antiques de S.A. le Prince Stanislas Poniatowski ([1830?]-1833), Christie's, London, vol. 3, 641, fig. 438, Cornelian