 Along with the Countess of Burlington, Abdy was one of the witnesses to the marriage in June 1749 at the Portuguese Embassy Chapel in S. Audley St. London, of David Garrick and Eva Maria Veigel.When in 1763 Sir Henry Slingsby, 5th Baronet died, Abdy with the support of William Cavendish, 4th Duke of Devonshire, Burlington's son-in-law, stood as Member of Parliament (MP) for Knaresborough, a seat he held until his death in 1775.Having had suffered from the gout in his last years, Abdy died of it in 1775.