Source: 18th Battalion Nominal Roll, April 1915.
This soldier enlisted with the 18th Battalion London, Ontario on January 13, 1915. He was originally assigned to the 33rd Battalion but transferred. He served with the Battalion until he took in late April 1916. He served the rest of the war in England earning a Good Conduct Badge and the rank of Actin Sergeant in 1918.
Per post of headstone of this soldier by Greg Melanson from the 18th Battalion Facebook Group. 
War Diary of the 18th Battalion CEF 