cover Barrackpore: 1836, 1838 (2) and 1840 entire letters, variously showing framed "B.P.O." (HG 4), framed "BARRACKPORE/Paid" datestamp (HG 5, two both in red with rates completed in manuscript), "BARRACKPORE/Bearing" datestamp (HG 6, used as a receiving mark on entire letter from London, redirected at Dum Dum and showing relevant transit datestamp); strikes a little mixed