By 1906, he had moved to Highlands in Old Road, Headington (now numbered 57), where he was to spend the rest of his life.
On 21 August 1909 in Bearsdon, Glasgow he married Jeanie Watt Fulton and they had four children.
Harrison died at age 79 on 7 November 1955 at 57 Old Road, Headington, Oxford.
Harrison was still at school at the beginning of 1881, but later that year he was articled to the Oxford architects Wilkinson & Moore.
[2] He started practising independently in Oxford in 1899, at first from his parents' home in Rectory Road.