cover 1837 E.L. from New York to Oporto, showing oval-framed "BARRA/DO/PORTO" and "160" in blue; 1851 and 1852 E.L. from Rio, per "Tay" and "Severn", to Oporto, showing double arc d.s. of the British P.O. across the flap, with "70/430", "70/490" and oval "LEY" h.s. on the address panels. All attractive.