1856 (Jan 18) flapless cover from England to "Lieut GB Headley RN/HM Ship Juno/Sydney ..." on the Australian Station with 2d blue x3 (one with trimmed perfs at base) tied by indistinct numeral cancels, 'BRIDLINGTON' (Yorkshire) despatch and Sydney 'SHIP-LETTER/MY 4' arrival b/s (both poorly struck & overlapping), largely very fine strike of the small British 'd1' accountancy h/s in red on face. Because it was addressed to an officer, the sender was not entitled to the 1d military concession. Carried as a packet letter with the 1d due to NSW (as compared to 3d for private ship letters) shown by the accountancy marking. [In 1857, Capt Stephen Grenville Fremantle, in command of 'Juno', annexed the Cocos (Keeling) Islands for the British Empire. In 1878 the 'Juno' was renamed the training ship 'Atalanta' and, in 1880, she disappeared on a voyage from Bermuda to Falmouth in what later became known as the 'Bermuda Triangle'. Ex Dr Tony Orchard. [A compelling forerunner for the collector of Cocos Postal History]