the money he earned in a benefit concert in Calcutta. In return, Inchiquin recommended Thomas to all his friends as a coal merchant; he had gone into that field after his marriage to Mary Wells in 1793 in order to support his growing family. Death and succession He died after a fall from his horse in Grosvenor Square, London on 10 February 1808. The title of Marquess of Thomond passed to his nephew William O'Brien, 2nd Marquess of Thomond. The barony of Thomond became extinct. References 1726 births 1808 deaths Politicians from County Clare 19th-century Irish people British Army personnel of the War of the Austrian Succession Inchiquin, Murrough Obrien, 5th Earl of Inchiquin, Murrough Obrien, 5th Earl of Deaths by horse-riding accident in England Grenadier Guards officers Obrien, Murrough Obrien, Murrough Knights of St Patrick Inchiquin, Murrough Obrien, 5th Earl of Inchiquin, Murrough Obrien, 5th Earl of Members of the Privy Council of Ireland Murrough Members of the Parliament of Ireland (pre-1801) for County Clare constituencies Members of the Parliament of Ireland (pre-1801) for County Kildare constituencies Marquesses of Thomond Irish chiefs of the name