cover 1866 (29 May) envelope from Embro, Canada addressed to British Guiana bearing 1859 1c., 10c. pair and 1864 2c., each cancelled with manuscript cross, showing despatch c.d.s. with, on reverse, Hamilton (30.5), St. Thomas (30.6) and arrival (8.7) datestamps. An attractive franking underpaid by 2c. Photo