Background
Sadleir was the youngest son of Thomas Sadleir, barrister, by his first wife, Rebecca, eldest daughter of William Woodward of Clough Prior, company
Sadleir was the youngest son of Thomas Sadleir, barrister, by his first wife, Rebecca, eldest daughter of William Woodward of Clough Prior, company
He was educated at Trinity College, Dublin, where he became a scholar in 1794, and a fellow in 1805. He graduated Bachelor of Arts 1795, Master of Arts
Tipperary. 1805, Bachelor of Divinity and Doctor of Divinity 1813. In 1816, 1817, and 1823 he was Donnellan lecturer at his college. From 1825 to 1835 Professor of Mathematics, and from 1833 to 1838 Regius Professor of Greek.
In politics he was a Whig, and an advocate of Catholic emancipation.
With the Duke of Leinster, the archbishop of Dublin, and others, he was one of the first commissioners for administering the funds for the education of the poor in Ireland, 1831. On 22 December of that year, during the viceroyalty of the Marquis of Normanby, he was made Provost of Trinity College, a post which he held for fourteen years.
On more than one occasion he is said to have declined a bishopric. He upheld the principle of the Queen"s colleges in Ireland.
Sadleir died at Castle Knock Glebe, company
Dublin, on 14 December 1851, and was buried in the vaults of Trinity College on 18 December. There is a portrait of Sadleir in the provost"s house, Trinity College.