CANADA, 1859, 12-1/2c Yellow Green (18; SG 40). Tied by neat strike of "Peterboro C.W. JA 16, 1866" duplex on mourning cover to Navan, Ireland, Montreal and receiving backstamps, red "Paid Derry Col. Packet JA 30, 1866" transit, fresh and Very Fine, with 2002 P.F. certificate