Born in Poplar, London c. 1868, Harry John Horn trained at Cardiff Baptist College, and pastored churches in South Wales, Northamptonshire, and London before retiring from the ministry in 1935. During the First World War he served with the Soldiers Christian Fellowship in France. Described as a man of ‘forceful personality and courage’, he was a ‘great Bible teacher’ and an ‘enthusiastic seeker of souls for his Master’.