Sugar Company. At Irish Sugar, he bought the first electronic computer in Ireland from Dora Metcalf in 1957. He died on 20 October 1986, aged 82. References External links War Room profile 1980 Interview Bibliography Writings Costello, Colonel M.J, "Guerilla Warfare" in (ed.) O'Reilly, Our Struggle For Independence (Cork 2009), pp. 187–98 Costello, Col. M.J, "A New Type of Warfare? German Strategy and Tactics, Parts I and II" in O'Reilly pp. 199–216 Costello, Col M.J, "Irish Soldiers Abroad: The Story of Ireland's Exile Soldiers", in O'Reilly, pp. 217–22 Costello, Col M.J, "The Principles of War", 4 parts in O'Reilly, pp. 223–44 Secondary sources Duggan, John.P A History of the Irish Army (Dublin 1991) Harkness, David, The Restless Dominion: The Irish Free State and the British Commonwealth 1921-31 (London 1969) O'Halpin, Eunan, Defending Ireland: The Irish State and its Enemies since 1922 (Oxford 1999) People of the Irish Civil War (Pro-Treaty side) 1904 births 1986 deaths Irish Army generals People from Cloughjordan Fort Leavenworth National Army (Ireland) officers Military personnel from County Tipperary