cover 1868 (22 Feb.) "O.H.M.S." entire letter headed "Camp Zoolah", written by Lt. Col. Bartlett, A.F.F. Treasurer to Major General, Political Agent, Aden showing, on reverse, a good strike of the "FIELD FORCE POST OFFICE/ABYSSININA/22 FE/68" c.d.s. in red and "ADEN STR. POINT" c.d.s. (26/2) in blue. A very rare Official letter from this Expedition. Photo