A Catalogue of the Extensive and Most Valuable Collection of Engraved Portraits, of the Most Illustrious and Other Eminent British Characters that Figure in the Annals of History and Biography, ... as Originally Collected by Horace Walpole, Earl of Orford; which Will be Sold at Auction, by Mr. George Robins, at His Great Rooms in Covent Garden, on Monday the 13th Day of June, 1842, and Nine Following Days ...