He became
Attorney-General for Ireland in 1782, and was elevated to the bench as
Lord Chief Baron of the Exchequer in 1783. He was created
Baron Yelverton in 1795, and in 1800
Viscount Avonmore in the
Peerage of Ireland. As Chief Baron, he led the opposition to the proposal to increase the number of judges in each of the
courts of common law from three to four, on the practical ground that four-judge courts often divide evenly and thus cannot reach an effective decision. Despite this common-sense view, the new judges were eventually appointed.
William Orr In 1797 he attained a degree of infamy for presiding over what was widely regarded as a "show trial" which led to the execution of the
United Irishman,
William Orr (although Yelverton is said to have shed tears when passing the death sentence on Orr). Orr was charged with administering the United Irish oath to a soldier called Hugh Wheatly; this had recently become a capital offence. In fact, it was generally believed that another man, William McKeever, administered the oath. Wheatly, who was the principal witness for the prosecution, later confessed that he had
perjured himself, but despite a superb defence by
John Philpot Curran, Orr was found guilty and hanged. Yelverton may have formed an early impression of Orr's guilt and acted on it – even his admirers admitted that as a judge he lacked impartiality.
Peter Finnerty, a journalist, was later convicted of seditious libel for publishing an attack on Yelverton over his conduct of Orr's trial: this did nothing to enhance the judge's reputation. ==Death==