40000352, Poniatowski, T321, HAPPINESS [FELICITY], GNAIOS, Gnaios, Catalogue des pierres gravées antiques de S.A. le Prince Stanislas Poniatowski ([1830?]-1833), Bern, Kunstmuseum; Merz Collection, Prendeville, J.: Explanatory catalogue of the proof-impressions of the antique gems possessed by the late Prince Poniatowski and now in the possession of John Tyrrell, Esq. (1841), Christie's, London, II.167, Chalcedony