Horace Leslie Carroll (SN 1456) from Pleasant Street Ballarat was a 22-year-old bricklayer when he enlisted alongside his older brother Thomas on October 24th 1914. He trained with the 14th Depot Battalion before embarking for overseas service aboard the Clan Macgillivray on February 2nd 1915. He served for a time with the 14th Battalion at Gallipoli before being returned to Egypt. In June 1916 he joined the battalion in France, and on August 8th he was reported as missing in action at Pozieres. A Court of Enquiry in April 1917 determined that he had been killed in action on that day, August 8th 1916. However, in September 1916, from hospital in England, Private Findlow had reported that he and four wounded 14th Battalion comrades, including Horace Carroll, were cut off from their unit and were taken prisoner near Mouquet Farm. It seems they were under the control of two German officers and Pte Findlow wrote '… but seeing they would have some difficulty to remove us, the second officer shot us … the other four were killed.' In 1927 a grave was discovered near Pozieres containing the remains of the four soldiers named by Pte Findlow. They were reinterred at the Serre Road No. 2 Cemetery. Horace Carroll’s name is now on the ex-Prisoners of War Memorial in Ballarat and on the honour board of the Pleasant Street State School.

His brother Thomas also served in the AIF and is honoured with a tree in the Avenue.