Cover with 'Royal Mail Steam Packet Company' imprint in brown on flap and manuscript 'By First Opportunity' on front franked on front with single 1881 1d lilac QV issue (SG 172) tied by BARBADOS squared circle cds dated AP 17 1899 with second strike alongside and also by straight line 'POSTED ON THE HIGH SEAS' marking in purple. Addressed to UK. This cover was carried by the R.M.S. Trent. Cover a little worn in places and with some faults on the reverse but a rare and attractive item.