His parents are unknown.
There has been some confusion with an Ulster Bank official also called Thomas Houston whose family lived in house 27, Cyprus Gardens, Pottinger, Belfast. Reference the 1901 and 1911 Irish Census.
The Belfast News Letter of 31st March 1917 reports:
Houston was later promoted to Lieutenant. Houston saw action with the Allied Advances 1918. He was injured and suffered a gunshot wound to the neck.
The Belfast News Letter of 21st September 1918 reports:
The Belfast News Letter of 11th November 1918 reports the awarding of the Miliatry Cross (MC):
Demobilisation came in October 1919.
Houston was awarded the Military Cross (MC), the British Victory Medal and the British War Medal.