Joseph Mayne was the youngest son of James and Mary Mayne, Ardcumber, Tullywiggan, Cookstown. He was working as a barman in Belfast at the outbreak of the First World War. Joseph Mayne was described as 5 feet 8 inches tall and 140 lbs in weight. He named his mother, Mary as next of kin. Joseph Mayne, who was in charge of the Lewis-gun, was wounded in many places, discharged a full magazine (47 rounds) into the enemy. Not one of the enemy reached the lines. Joseph Mayne then collapsed unconscious across his gun. He died of his wounds a short time later.