Albert Joseph Miller
Leading Telegraphist. Died 31.1. 1918. J/19598. Royal Navy. H.M S/M E50. Portsmouth Naval Memorial.
His page is here https://livesofthefirstworldwar.org/lifestory/6300964
The National Archives recorded numbers without the / and this is how the data appears on lives to begin with so its easiest to search for Navy men without it i.e.J19598