A historian, Patrick Guinness has authored the first biography of Arthur Guinness, the founder of the Guinness brewery dynasty [REF].
He has produced monographs on the early history of the Friendly Brothers of St Patrick in Kildare, 1758-91;[REF] on the depositions from Kildare on the outbreak of the Irish Rebellion of 1641;[REF] and on the Irish Jacobite ancestry of the Mitford family (privately published).