Source: T.O.S. December 1916 per War Diary.
Family Search: When Lieutenant John McHardy was born on 4 January 1889, in Caithness, Scotland, United Kingdom, his father, John McHardy, was 32 and his mother, Helen Sinclair, was 32. He married Joan Vincent on 26 March 1909, in Caithness, Scotland, United Kingdom. They were the parents of at least 1 daughter. He immigrated to Canada in 1913 and lived in Wick, Caithness, Scotland, United Kingdom in 1901 and St. Thomas, Elgin, Ontario, Canada in 1915. He registered for military service in 1915. In 1915, at the age of 26, his occupation is listed as watchmaker in St. Thomas, Elgin, Ontario, Canada. He died on 26 August 1918, in Guémappe, Pas-de-Calais, Nord-Pas-de-Calais, France, at the age of 29, and was buried in Tilloy-lès-Mofflaines, Pas-de-Calais, Nord-Pas-de-Calais, France.
This soldier was a 26-year old watchmaker who enlisted at St. Thomas, Ontario January 13, 1915. He was originally assigned to the 9th Battalion and was posted as a Temporary Lieutenant on November 21, 1916. On December 2, 1916, he was posted for duty with the 18th Battalion and arrived with the Battalion on December 7, 1916, in France. He served with the Battalion until wounded on December 27, 1916. He returned to England for treatment and proceeded to France when recovered to serve with the Battalion, arriving September 9, 1917. He received two 14-day leaves in the intervening time and returned from his last leave in July 1918. He served with the Battalion until receiving mortal wounds on August 26, 1918, dying of them the same day.
August 8, 1918 War Diary entry reads: “Up to this time the casualties had been much smaller than anticipated although Lieut. McHardy had gone only a short distance from the Assault trench when he sustained mortal shrapnel wounds.”
History of the 18th Battalion CEF, "The Fighting Eighteenth" 