A native of Old Derrig, Queen’s County, Thomas was a career officer in the British army. He served with the 27th Foot (Enniskillens) in the expeditions to Malta, Naples, and Sicily (1805-13) before embarking for the Peninsula, where he took part in the battle of Vittoria, the siege of Pampeluna, and the Pyrenees campaign (1813). He distinguished himself at the battles of Nivelle, Orthes and Toulouse (1813-4), for which he was decorated, his horse having twice been killed under him. He then participated in the Plattsburgh campaign in Canada (1814) before serving with the Army of Occupation in France. He was posted to India in 1827 and subsequently commanded his regiment in Bombay for eight years before returning home in 1835.
A Protestant, Thomas came forward as the Conservative candidate for Kinsale at the 1835 general election, being connected to the town through his sister’s marriage to a member of the local gentry.
Shortly before the 1837 general election Thomas purchased a large estate ‘out of the fruits of honourable industry’ at Erindall, near Carlow.
Thomas spoke in the House only rarely, chiefly confining himself to military affairs. In urging that more money be expended on maintaining military barracks in March 1839, he clashed with Joseph Hume, after alluding to Hume’s dual role as a medical officer and commissary to a regiment in India, whereby he had ‘amassed a large fortune … by supplying rations to the army’.
Despite Liberal assertions that Thomas was ‘but a puppet in the hands of the managers of the Carlton Club’ and was ‘notoriously incapacitated, by the state of his health for the discharge of legislative duties’, he came forward again for Kinsale in 1841 only to retire unexpectedly from the contest shortly before the nomination.
