200000400, Tassie, 400, HARPOCRATES STANDING, FINGER TO MOUTH, HOLDING A CORNUCOPIA, Tassie, J.; Raspe, R.E.: A Descriptive Catalogue of a General Collection of Ancient and Modern Engraved Gems,... (1791), Percy, (Lord Algernon), 36,NO.400,TRAY 6.2, 6.4, Sardonyx