Philip Stanhope, Second Earl of Chesterfield, His Correspondence with Various Ladies Among Whom is Notably Barbara Villiers, Later Lady Castlemaine & Duchess of Cleveland, and Letters Exchanged with Sir Charles Sedley, John Dryden, Charles Cotton, Mr. Bates, &c., Now for the First Time Printed Correctly & Extensively from the Earl's Letterbook. A Defence of Barbara Villiers