Source: Doing research about Nova Scotia enlisted men who served with the 18th. Search at CGWP web site.
Family Search: When Private Clifford Martin Kelly was born on 25 August 1898, in Halifax, Nova Scotia, Canada, his father, James Joseph Kelly, was 24 and his mother, Catherine C. Chambers, was 26. He married Charlotte Anne Annie Munroe on 27 February 1921, in Nova Scotia, Canada. They were the parents of at least 1 son and 2 daughters. He lived in Halifax, Halifax, Nova Scotia, Canada for about 10 years. He registered for military service in 1916. In 1916, at the age of 18, his occupation is listed as pipe fitter. He died on 17 October 1981, in Cambridge, Middlesex, Massachusetts, United States, at the age of 83, and was buried in Massachusetts, United States.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 