Source: Re. post with photo in inscription by a soldier with a similar name on the bell tower at Bouvigny Church.
Find-A-Grave
Family Search: When Private Percy Gibbons was born on 23 March 1897, in Toronto, York, Ontario, Canada, his father, Richard Gibbons, was 37 and his mother, Helen Ann Dubber, was 40. He lived in Ohio, United States in 1903. He registered for military service in 1917. In 1917, at the age of 20, his occupation is listed as auto driver in Cleveland, Cuyahoga, Ohio, United States. He died on 29 June 1943, in Cleveland, Cuyahoga, Ohio, United States, at the age of 46, and was buried in Ohio, United States.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 