[1] Hardy sat as representative for Mullingar from his first entrance into parliament until the Union with Great Britain in 1800/01.
Although he was short of money Hardy declined governmental overtures, by which it sought to induce him to vote for the legislative union with Great Britain.
[1] Hardy co-operated with Lord Charlemont in the establishment of the Royal Irish Academy at Dublin in 1786, and in 1788 contributed to its publications a dissertation on some passages in the Agamemnon of Æschylus.
[1] The publication of some of the writings of Charlemont, who had died in 1799, was planned by Hardy; and he then undertook a biography at the suggestion of Richard Lovell Edgeworth.
It appeared in London in 1810, Memoirs of the Political and Private Life of James Caulfield, Earl of Charlemont, Knight of St. Patrick.