Jean Longstaff has submitted the following:-

Thomas was the third son of ship riveter William Lodge Coulthard and his wife Eleanor or Ellen Hall, who had married in South Shields in 1870. By 1881 they were living in Cowpen, near Blyth and Thomas, born on 2nd September 1875 in Jarrow, was one of a family of five, three brothers John, William and Andrew and one sister Annie. Their father William died in 1889 and by 1891 they were sharing a house in Westoe with another family. Thomas married Virtue Miller Siddle at the end of 1896, and by 1901 he was a commercial traveller and he and Virtue were living in South Shields. p>At the time of the 1911 census Virtue is listed living by herself in South Shields, so it can be assumed that Thomas had already left for Canada, and in July the following year Virtue and their 4-year-old daughter Gladys left England to join him in Fort William, Ontario where he had found work as a cook. The three of them returned to England in May 1913 and Thomas returned to Canada by himself.

On 18th May 1915 in Port Arthur Thomas enlisted in the Canadian Expeditionary Force and became Private A39180 of the 52nd Battalion, but this did not last long as from 21st July he is listed as a deserter, but just two weeks later he enlisted again at Camp Niagara on 4th August, and although he had shrunk in height from his first attestation, he became Private 142081 posted firstly to the 76th Battalion and in October transferred to the 37th. This Battalion embarked for England on the SS Lapland on 27th November 1915 arriving on 11th December, and based at Shorncliffe it provided reinforcements to the Canadian Corps in the field until July 1916, when it was absorbed by the 39th Battalion.

In August Private 142081 was transferred to the 73rd Battalion as a reinforcement and at the end of the month found himself in France as part of the new Canadian 4th Division. Rotating between the front line and reserve brigade duties the Battalion saw action at the Battle for Ancre, and it just after this that Thomas Hall Coulthard was killed in action on 27th November 1916 in the Courcelette area. His wife Virtue remarried in 1921 and died in 1940.

His name does not appear on any local war memorial.

In Canada he is remembered on their Virtual War Memorial and in their Book of Remembrance

Canadian Book of Remembrance
Canadian Virtual Memorial
The CWGC entry for Private Coulthard