A Catalogue of Several Libraries Lately Purchased, Particularly of the Right Hon. Countess Dowager of Portland, George Proctor, ... Rev. Squire Payne, ... and Mr. Josiah Holder, ... Which Will be Sold Very Cheap, ... on Monday August 26th, 1751. and Continue Till All are Sold. By John Whiston and Benj. White, Booksellers in Fleetstreet. Catalogues May be Had ... of Mr. Merrill at Cambridge, Mr. J. Fletcher at Oxford, Mr. Dodsley, ... Mr. Strahan ... and at All the Principal Booksellers in England, Mr. Kincaid, at Edinburgh, and Messrs. Ewing, at Dublin