Born in England, Claud Castleton (1893-1916) arrived in Melbourne in 1912 seeking travel and adventure. For three years he toured Tasmania, the eastern states, and Papua. He was in Port Moresby when the First World War began, but in March 1915 returned to Sydney to enlist. He served on Gallipoli with the 18th Battalion and in March 1916 transferred to the 5th Machine Gun Company.

Castleton was killed at Pozières on 29 July 1916 during an action for which he was posthumously awarded the Victoria Cross. During a night attack on enemy trenches, the infantry was driven back and then held down by intense enemy machine-gun fire. Many wounded men were left lying in no man's land, and on two occasions Castleton went out in the face of enemy fire to bring in wounded men on his back. When he went out a third time, he was himself hit in the back and instantly killed. His body was later recovered and is buried in the main British war cemetery at Pozières.