Blanche & Thomas Edward Allard, Ontario

I'm trying to locate the descendants of Blanche and Thomas Edward Allard from Toronto or Trenton, Ontario, Canada.Thomas was killed in April 1916 at the Battle of Vimy Ridge, France, during World War I.I have letters he wrote while in the trenches at Vimy to his sister, my grandmother, and in them he speaks of his wife Blanche and his little children at home in Canada.Apparently, Blanche remarried after Thomas was killed.We would like to locate Blanche and Thomas's children or grandchildren and share these very moving letters with them.
Peggy Ogden