The offices were split between Alexander Plunket and Sir James Ormond, who became Lord Treasurer of Ireland.
Ireland was in great conflict at this time, as Henry VII tried to get the Irish to pledge loyalty to him, instead of their own Kings and Princes.
O'Flanagan[1] states that it is impossible to form any opinion on his career as Lord Chancellor, since no record of any of his judgments exists.
He was born at Rathmore in County Meath, son of Sir Thomas Fitz-Christopher Plunket, Lord Chief Justice of the King's Bench in Ireland and his second wife Marion Cruys (or Cruise), daughter of Sir Christopher Cruys; he was a first cousin of another Sir Thomas Plunket who became Chief Justice of the Irish Common Pleas,[2] both being grandsons of Christopher Plunket, 1st Baron Killeen.
So long as the House of York held power he appears to have been a loyal enough Yorkist; he was at Court in 1479, and in 1484 received a letter from Richard III thanking him for his services.