See this page for a list of the Military Medal recipients of The RCR:
http://thercr.ca/honours_awards/03-military_medal.htmThe list is reproduced from the first volume of the Regimental History, with one addition of a recently identified recipient (so there may be other errors).
With the Military Medal, many were awarded for single acts of bravery, but others were awarded for individual performance over time. In the latter case, there may not be a specific citation describing why he received the medal.
The page above includes dates of "Gazetting" (where the listing has been found), which was the official publication of the award in the London Gazette. You can search the London Gazette here to see the applicable pages (the search function is a bit frustrating at times):
http://www.gazettes-online.co.uk/archiveSearch.asp?WebType=0&Referer=WW1You can also try searching the War Diary for mentions of his name:
http://thercr.ca/history/1914-1919/CEF_War_Diary.htm