Son of Rivett Francis Guise (Indian Police) and Mary Guise (nee Boissier). Went to South Africa in 1913 at settled as a rancher at Harrismith, Orange Free State. Was with South African Rifles during Rebellion. ref. South African Roll of Honour 1914-1918
LG Sup 16 September 1918 - "For conspicuous gallantry and devotion to duty while in command of a company. He was ordered to fill a gap and take up a line between two companies, which were each attacking groups of buildings. He effected this, capturing a few prisoners, and adjusted the line, consolidating so quickly that when the enemy put down a heavy barrage, his company sustained but few casualties. Throughout the operations he set a fine example of ability and courage."