A catalogue of the genuine collection of pictures, models, coins, and drawings framed and glazed, of William Kent, Esq; deceased [electronic resource] : late principal painter and architect to his Majesty. Which will be sold / by auction, by Mr. Langford, at his house (late Mr. Cock's) in the Great Piazza, Covent Garden, ... on Monday and Tuesday the 13th and 14th of February 1748-9