Osborn Cornell (SN R5) was a 21 year old chemist when he enlisted on August 18th 1914. He embarked from Melbourne on the Wiltshire with the first contingent in October and served as a Sergeant Dispenser with the 2nd Field Ambulance at Gallipoli and Egypt in 1915. He then served at the 3rd Australian General Hospital at Brighton, England, before returning to Australia as a Staff Sergeant on the Benalla, disembarking on February 19th 1917. At his own request he reverted to the rank of Private and joined the 3rd Australian Machine Gun Battalion. On November 26th 1917 he left Australia for overseas service
once more. He served in France until August 10th 1918 when he was killed in action by a bullet to the chest. He was 25 years of age. He has no known grave and is commemorated on the Australian National Memorial at Villers-Bretonneux in France.

His brother Harold died in an aircraft crash in 1917 while serving with the Australian Flying Corps and is also honoured with a tree in the Avenue.

Lucas’s Staffs Appreciation of Brave Men, the original Avenue register, records his name as Osborne Cornell.