Lance Corporal Ralph Milton Gibson was born in Petrolia, Ontario, September 16, 1893 to parents John and Helena Gibson.  He enlisted on December 20, 1915 in Montreal, Quebec with the 5th Overseas Universities Company (McGill Co.).  Gibson sailed to France on April 1, 1916 aboard the S.S Olympic, arriving in England on April 11, 1916.  On June 7, 1916 he was sent to France, where he joined the Princess Patricia's Canadian Light Infantry (Eastern Ontario Regiment).  While serving with the PPCLI Gibson was killed at Vimy Ridge on April 9, 1917.

External links:
Lance Corporal Ralph Milton's service record (Serv/Reg# 487442) can be viewed/downloaded in pdf format through Library and Archives Canada.
Burial Information is available at the Commonwealth War Graves Commission.
A memorial page honouring Gibson can be visited online at the Canadian Virtual War Memorial.
Lance Corporal Ralph Milton's Circumstances of Death Register card can be viewed/downloaded through Library and Archives Canada.