cover 1756 (11 Oct.) entire letter to "Mr. Holcombe, General Post Office, London" from Cambridge, the address panel with manuscript "P" (to denote Privelege or Free mail), the reverse with fine "13/OC" Bishop Mark. Also 1800 (3 Dec.) entire letter with printed Parliamentary Proceedings inside, used from London to Durham, showing two good to fine strikes of the large 'apple' "FREE" d.s. (Willcocks & Jay 792); fine