A catalogue of the superb, capital, and truly valuable collection of celebrated Italian pictures, lately purchased from the Colonna, Borghese, and Corsini palaces, &c. by William Young Ottley, Esq. : forming an unrivalled assemblage of the genuine and finest works of the Italian schools : which will be sold by auction, by Mr. Christie, at his Great Room, Pall Mall, on Saturday, May the 16th, 1801, at twelve o'clock