cover 1846 Soldier's envelope from a teacher at the Artillery Regimental School at Dum Dum, to Scotland with h.s. "2" and, on reverse, "DUM DUM/FREE" oval h.s.; 1864-66 Soldier's envelopes to England and Scotland (2) each bearing 8p. with cancellations of Gwalior, Peshawar and Rawalpindi, and 1896 Soldier's envelope from Meerut to Brighton and redirected to Lewes bearing 1882 1a.; some faults though an interesting group