I cannot find a commission for this S G Williams in Kings Liverpool, nor a MIC
However the RIC Register gives D J Williams which leads to the same ADRIC no of 2175. It appears that our man is in fact DJ Williams
1921 Nov 14. Joined ADRIC with service no 2175. Posted to H Coy
1922 Jan Discharged on demobilisation of ADRIC
1925 Married Bessie Evans