A catalogue of a small but select and highly valuable collection of Italian, French, Flemish and Dutch pictures, the property of an eminent collector, purchased by him in Italy or recently in Spain; or which were formerly in the distinguished collections of Welbore Ellis Agar, & Walsh Porter, Esqrs. ...: Which will be sold by auction by Mr. Christie, (by permission,) at the private picture gallery in Oxendon Street, on Friday, the 21st of June, 1811 ...