Stampless Commercial Letter from Tillinghast & Holroyd to Aaron Lopez, October 10, 1772 A one-page stampless commercial letter sent from Tillinghast & Holroyd in Providence, Rhode Island, to Aaron Lopez in Newport, Rhode Island, on October 10, 1772. The letter bears a manuscript "Bo" postmark and a 2dwt (pennyweight) rate marking. The letter contains detailed commercial information.