[1] While Charles was at Oxford, Bacon was one of the sworn judges still at Westminster, of which there were three, and presided alone in the King's Bench, as Edmund Reeve and Trevor did in the Common Pleas and Exchequer.
At the trial of Connor Maguire, in Hilary term 1645, on the charge of high treason for his share in the Irish Rebellion of 1641, Bacon was the only judge.
He committed to prison James Symbal and others in 1647 'for speaking of words against the king in time of war', with Serjeant Cresheld.
[2] He continued to sit on the bench until 1649, when new commissions were issued to the judges, and they were required to take the oath in the name of the people instead of in the king's name.
Bacon and five of his brethren resigned their seats, while the other six judges agreed to hold office.