cover Mount: 1834-56 entire letter, entire (side flaps missing) and envelopes (3), variously showing framed "MOUNT/POST NOT PAID" (HG 2), framed "MOUNT/POST PAID" (HG 4), framed "ST. THO'MOUNT/Paid." (HG 5, two examples), framed "ST. THO'MOUNT/Bearing." (HG 6) in blue; poor to fine