I am almost certain that this man was killed in action during World War 1 as there is a Robert James Gordon listed on the Roll of Honour in 1st Kilrea Presbyterian Church.
https://www.cwgc.org/find-war-dead/casualty/1737879/gordon,-robert-james/
Rifleman
GORDON, ROBERT JAMES
Service Number 26091
Died 07/06/1917
4th Bn. 3rd
New Zealand Rifle Brigade
Son of Mrs. T. Gordon, of Lislea, Portglenone, Co. Derry, Ireland.
Commemorated at MESSINES RIDGE (N.Z.) MEMORIAL
Location: West-Vlaanderen, Belgium
Number of casualties: 828
See cemetery plan
MEMORIAL DETAILS
https://weshallrememberthem.wordpress.com/
With a population of just over a million New Zealand sent 103,000 men overseas in the First World War. 18,500 died and over 50,000 were wounded.
At this time 95 years ago Australian and New Zealand troops were preparing for their role in the battle for Messines Ridge near Ypres in Belgium. It was the first time they had actually fought alongside each other on the Western Front. The attack was carefully prepared – twenty-four mines, packed with over 500 tonnes of ammonal had been placed under the German lines. When they exploded at 3.10 a.m. on June 7th 1917 it is said the sound of the explosion could be heard in London. (The film “Beneath Hill 60” tells the story of the Australian tunnellers in Flanders.)
For eleven days prior to the attack 3.5 million shells reduced Messines and Wystschaete to rubble and the ridge to a brown wasteland. This poem was published in “New Zealand at the Front” – a magazine published and illustrated in Flanders by men of the New Zealand Division 1917 issue, page 141.
The report from the Auckland Weekly News (30 August 1917) states “The Great Battle of Messines Ridge. Where the New Zealanders played a glorious part: A view of a mashed German Observation Post and Trenches in the vicinity of the Ridge.
However, the ‘Battle of Messines’ lasted another week, as German guns bombarded the newly captured areas with increasing ferocity. By the time the New Zealand Division was relieved 700 men were dead and another 3000 wounded.