Francis was educated at Wimborne Grammar School; at Cheltenham College; and at St Mary's Hospital, London - qualifying in 1902. He entered the Medical Services at the rank of Lieutenant on 31st January 1903, then served in South Africa from 1904 - 1909, during which time he was promoted to Captain on 31st July 1906. He gained further promotion to Major on 31st October 1914. Francis served with the Indian Expeditionary Force in the Persian Gulf. He died of paratyphoid at Kut-al-Amarah, Mesopotamia. He was the son of Lt. Col. Walter Miller, D.S.O. (Royal Marine Artillery) and Frances M (daughter of Francis Burdett Courtenay) Lambert; and the husband of Norah Evelyn (daughter of Col. Percy Stranley) - married at All Saints’ Church, Branksone, Dorset on 3rd September 1910. They had one daughter.