 On the three separate occasions on which he was returned for Maldon his opponents petitioned against his election, alleging bribery or improper conduct by the bailiff (who was the returning officer for the borough); but their only success was in 1715 when they also accused him of having refused to take the Qualification Oath, and his election in that case was declared void on those grounds.He was made serjeant-at-law in 1705, and was appointed a Baron of the Exchequer and knighted in 1726, a Justice of Common Pleas in 1736 and Chief Baron of the Exchequer in 1738.Comyns is the author of 'Reports of Cases adjudged in the Courts of King's Bench, Common Pleas, and Exchequer.'