Royal Naval Reserve service records 1860-1955 BT/377/7, The National Archives.  Part of card for James Eynon TS2190.  Jim joined the RNR on 3 March 1915, giving his address as Bridlington, and his parents' address as Argyle Street, Fitzroy, a suburb of Melbourne, Australia.  And said he was born in London, though he was in fact born in Fitzroy. The above card shows his first posting was on the Mopsa.