Corporal J. W. Barr of the 2nd Field Ambulance wrote of Gillison, “Stained by earth and the blood of fellow men, he was grandly eloquent, his clothes and appearance telling us what he did not.”
They spoke of Christian ministration while he supported the weakening frame from which the soul was speeding; a Christ-like devotion to his fellow-men that found him near them in their last moments”. Gillison was involved in the decision to agree to the armistice on 24th May 1915, proposed by the Turks, to bury the huge number of dead lying between the Turkish and ANZAC lines.
Gillison was one of those who went over to retrieve the dead. He wrote later in his diary: "Our dead were the result of the first day’s advance. I never beheld such a sickening sight in my life, and hope it may not be my lot again". But he carried the dead in and buried hundreds in shallow massed graves.