A catalogue of several libraries and parcels of books, Lately Purchased by Benjamin White, Bookseller, at Horace's Head, Fleet-Street, London. Containing A very Valuable and Large Assortment of Curious and Useful Articles in every Branch of Literature. The Sale will begin on Monday, the 7th of August, 1780. N. B. The Prices are marked in the Catalogue, and in the first Leaf of every Book.