Hubert was educated at Bedford Grammar School; at Emmanuel College, Cambridge; and at St Bartholomew's Hospital, London - entering in 1903, he obtaining the diplomas of M.R.C.S.[Eng.] and L.R.C.P.[Lond.] in 1910. He was a keen sportsman, and whilst at school was in the 1st Football XV, as well as being a member of the School Boat Club - in the 1st Eight boat, and at Cambridge won in his first term the three-mile race. After qualifying he served as house-surgeon to the Huntingdon Hospital and Fulham Infirmary, and was in practice at Putney, London when he gained a commission in the R.A.M.C. on 2nd December 1914. Hubert joined the Expeditionary Force on the Western Front, entering the war in France on 20th August 1915. He was wounded in the arm on 14th September 1916 and attended to at a casualty clearing station, but he returned to duty the next day, refusing to leave his unit, although his right arm was in a sling for a month. He was killed near Elverdinghe. His Colonel wrote to his family: “Your son has been attached to my headquarters for more than a year, and his knowledge of many of the officers and men dated from much longer ago - from the early days of training in England. He was liked by all, and both officers and men sought him out in preference to other medical officers when sick or wounded...... At my headquarters he helped in a number of ways. On many occasions I have felt anxious for him when he was promptly and fearlessly gone off to render help at a battery which was being heavily shelled. When I was wounded your son came to me through a barrage of gas shells, from the battery where he was temporarily living. And after giving me skilled attention, personally accompanied me to the dressing station across ground which was frequently shelled at night. His loss, coupled with that of my adjutant, killed by the same shell, had been a heavy blow to me and the whole brigade. Hubert was the son of the Rev. Frederic William and Charlotte [daughter of Alfred Malim] Harris of 22 Carlton Road, Putney, London; and the brother of 2nd Lieut E. E. Harris.