Hello again. Another entry in my grandfather's diary, this one in March 1914 shortly after he joined HMS Dartmouth at Muscat:
"Also found that my SGM McCArthy was an old friend when we both joined at Pembroke Chatham Depot, the last time I saw him was when we were bringing the “Challenger” forward at Chatham for commissioning, he went away to Australia in her and then changed to Devonport whilst I went to the Destroyers, Salmon in 1904 April, one way and another seemed to have fallen in pleasant circumstances for a better SI for mate could never expect to meet".
My grandfather was a Gunner and I am wondering if "SGM" is the abbreviation for Senior Gunner's Mate but I am puzzled by abbreviation "SI". Any ideas?