Major Barthorp retired from service in 1968, to become a military historian and writer. He was a member of the Victorian Military Society and contributed to their magazine Soldiers of the Queen.
Predeceased by his wife Penelope, they were survived by two sons and a daughter, grandchildren, and great-grandchildren.[1]
Bibliography
(1974) The Northamptonshire Regiment (Famous Regiments), Leo Cooper, ISBN0-8505-2146-7
(1976) Crater to the Creggan: A History of the Royal Anglian Regiment, 1964-74, Leo Cooper, ISBN0-8505-2212-9
(1979) Indian Infantry Regiments, 1860-1914, UK: Osprey Publishing, ISBN0-85045-307-0
(1979) To Face the Daring Māoris, Hodder and Stoughton, ISBN0-3402-2719-2
(1980) The Zulu War: A Pictorial History, Blandford Press, ISBN0-7137-1005-5
(1980) Marlborough's Army 1702-11 UK: Osprey Publishing, ISBN0-8504-5346-1
(1982) British Military Uniforms Since 1660, Poole: New Orchard Editions, ISBN1-85079-009-4
(1982) British Infantry Uniforms Since 1660, Littlehampton Book Services, ISBN0-7137-1127-2
(1982) The Jacobite Rebellions, 1689-1745, London: Osprey Publishing, ISBN0-85045-432-8
(1982) The North-West Frontier: British India and Afghanistan, a Pictorial History 1839-194, Blandford Press, ISBN0-7137-1133-7
(1984) War on the Nile: Britain, Egypt and the Sudan, 1882-1898, London: Blandford Press, ISBN978-0-71371-310-7
(1984) British Cavalry Uniforms Since 1660, Littlehampton Book Services, ISBN0-7137-1043-8