200001187, Tassie, 1187, A WOMAN RIDING A SWAN: LEDA, VENUS? WAVES BELOW, HATCHED BORDER., British Museum, London, Tassie, J.; Raspe, R.E.: A Descriptive Catalogue of a General Collection of Ancient and Modern Engraved Gems,... (1791), 104,NO.1187,TRAY 19.2, 19.4, scarab, Rock crystal