The RIC Register gives him clearly as Stephen R Thompson of the Merchant Marine.
1890 Oct 31 Born Robin Hood Bay, Yorkshire
1901 census at Fylingdales, Yorks
1912 Feb 13 Passed 2nd Mate Cert
1913 Dec 13 Passed 1st Mate Cert
1914 Jun 22 Married in Penarth, Wales to Marian Denning
1915 Dec 31, Passed Masters Cert
1921 Jun 23. Joined ADRIC with service no 2078. Posted to F Coy
1922 Jan 17 Discharged on demobilisation of ADRIC
1927 Oct 18 Died in Sierra Leone. He was on SS Inverness and died at European Hospital Hill Station in Freetown, Sierra Leone. He was 1st Officer on the ship and died of Paratyphoid (Black Water Fever)