Memoirs of the northern impostor; or prince of swindlers. [electronic resource] : Being a faithful narrative of the adventures and deceptions of James George Semple, commonly called Major Semple, alias Harrold, Maxwell, Grant, &c. &c. With an account of his devices at Lord Salisbury's, Sir Thomas Dundass's, Mr. Pitt's, the Marquis of Lands-Down's, Baron Hompesch, Dr. Prettyman, &c. &c. Also the various inventions by which he obtained goods of different tradesmen; and the Names of the Persons who were the Objects of his Depredations. To which is annexed his trial, and sentence.