Containing a Very Fine Collection of Books, in Antiquities, Medals, and Natural History, with Many of the Best Spanish Authors, and Many Valuable Manuscripts on Vellum : which Will Begin to be Sold by Auction, by S. Baker and G. Leigh, Booksellers, at Their House in York Street, Covent Garden, on Monday, February the 25th, 1771, and to Continue the Sixteen Following Evenings, Beginning Each Evening at Six O'clock