Robert Stanley Halliday (SN 3775) was educated at the Humffray Street State School and was a 19 year old grocer when he enlisted on July 12th 1915. He was posted to the 14th Infantry Battalion and embarked from Melbourne on board the Ceramic in late November. While in Egypt he was transferred to 46th Infantry Battalion with whom he moved to France. He was seriously wounded in the trenches in August 1916 and was evacuated to hospital in the UK. During his convalescence he accidentally fell down a steep enbankment while walking with friends, and died on February 14th 1917. The coroner found that he died of "concussion of the brain." He is buried in Wareham Cemetery, Dorset, UK. He was 19 years of age.
He is remembered on the Honour Board of the Humffray Street State School, Ballarat.

His brothers William and Ernest also served in the AIF and are honoured with a tree in the Avenue.

Lucas’s Staffs Appreciation of Brave Men, the original Avenue register, records his name as Stanley R. Halliday.