Source: November 1918 casualty.
Family Search: When Private John Thomas Gratwick was born on 14 April 1889, in Portsmouth, Hampshire, England, United Kingdom, his father, Gratwick, was 28 and his mother, Louisa Gratwick, was 29. He immigrated to Canada in 1911 and lived in Portsea, Hampshire, England, United Kingdom in 1891. He registered for military service in 1916. In 1915, at the age of 26, his occupation is listed as sailor. He died on 10 November 1918, in Frameries, Hainaut, Belgium, at the age of 29, and was buried in Frameries, Hainaut, Belgium.
Private John Thomas Gratwick, reg. no. 406652.
This man enlisted at Peterborough, Ontario, with the 36th Battalion on 4 May 1915. He was a sailor by trade and practiced the Presbyterian religion. He had prior military experience, having served 3 years with the 35th Huron Foresters.
He arrived in England on 28 June 1915 and was transferred to the 18th Battalion, effective 20 November 1915 and was taken on strength with the Battalion on 1 December 1915.
He was sent to No. 6 Canadian Field Ambulance on 15 August 1916, and then to the No. 2 Divisional Rest Station on 17 August 1916, rejoining his unit on the 20th. He was suffering from a sore throat during this time.
He required more medical treatment for an I.C.T. in his leg. He was sent to No. 6 Field Ambulance on 2 March 1917, then to No. 5 Canadian Field Ambulance on 5 March 1917, then to No. 4 Canadian Field Ambulance on 7 March 1917, rejoining his unit on 15 March 1917.
On 8 August 1917, he was again admitted to No. 10 Canadian Field Ambulance with severe influenza. He was then sent to No. 22 ORS (?) on 20 August 1917 and then to No. 4 General Hospital at Camiers on 28 August 1917. He was sent to No. 6 Convalescent Depot the next day and was then transferred to No. 13 Convalescent Depot at Trouville, France on 1 September 1917. He was discharged for duty on 30 October 1917.
On 10 November 1918, he died of wounds sustained in combat at No. 6 Canadian Field Ambulance.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 