40000553, Poniatowski, T525, APOLLO CHANGING THE SERPENT TO STONE FOR ATTEMPTING TO DEVOUR THE HEAD OF ORPHEUS, GNAIOS, Gnaios, Bonhams, London, Private 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, Catalogue des pierres gravées antiques de S.A. le Prince Stanislas Poniatowski ([1830?]-1833), 14 Oct 2021, lot 20, Cornelian

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