Captain Walter Gamble was born in Edinburgh, Scotland. He was the son of Dr Morris Gamble, at one time medical superintendent of the Ararat Hospital for the Insane. He was educated at the Church of England Grammar School, was a student cadet, and attended Melbourne University. After rowing in the Wesley College team that won the Head of the River, he enlisted in May 1915 and left Melbourne in July 1915. He served with 7 Battalion Australian Imperial Force, transferred to 59 Battalion on 24 February 1916 and served with the 15 Australian Light Mortar Battery.
Captain Gamble trained in Egypt and served on Gallipoli from September to December 1915. He was one of the last 60 ‘diehards’ to withdraw from Anzac Cove in December 1915, and in France where he was promoted 2nd Lieutenant in August 1916. In an examination of 200 officers from England, Canada and Australia, he headed the list. Captain Gamble was awarded the Military Cross for conspicuous gallantry and devotion to duty in 1917. His appointment was terminated in England on 12 February 1918 as he was appointed to a commission in the Indian army and served with the 1/91st Punjabis. Gamble was recalled to serve in 1939-1946 during the Second World War and awarded an OBE. HE died on 26 December 1955.