cover -- 1857-59 covers and small pieces or stamps off-paper (17), a good collection of Pearson Hill experimental cancellations, with second type ("A/LONDON") on 1857 entire and on single stamps (12) with codes 2, 3, 4 A & M, third type ("Opera Glass") on two stamps and "twin-circle" type code "CC" on stamp: and an interesting study of the Duplex types "3" and "4", one cancelling 1s value on 1859 entire to Paris. (28 items)