A fine 1915 letter ‘POSTED ON THE HIGH SEAS‘ from the Royal Mail Steam Packet ARAGUAYA to Blackrock, Dublin. Franked with 2x KGV 1/2d Green and cancelled by a CDS. Back-stamped with a BLACKROCK receiveing CDS ’23 MR/15′. Fine ‘THE ROYAL MAIL STEAM PACKET COMPANY’ seal on reverse. Four page letter on similarly head paper with R.M.S.P “ARAGUAYA” with fascinating contents regarding the journey, the sinking of a German boat and onboard news via Marconi bulletins.