Source: January 1918 casualty.
Family Search: When Private Thomas Marshall Brocklebank was born on 6 January 1892, in Niagara Falls, Welland, Ontario, Canada, his father, Moses Brocklebank, was 48 and his mother, Mary Agnes Dalton, was 23. He lived in Essex, Ontario, Canada for about 10 years. He registered for military service in 1915. In 1915, his occupation is listed as canadian private soldier in Europe. He died on 19 January 1918, at the age of 26, and was buried in Kirkdale Cemetery, Liverpool, Merseyside, England, United Kingdom.
Died of wounds. CWGC site has middle name as Mashall. Records show it is Marshall.
Was a Mason, member of Ontario Lodge No. 521, Windsor, Ontario.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 