A special election was held in Massachusetts's 10th congressional district on August 1, 1796 and September 12, 1796 to fill a vacancy left by the resignation of Benjamin Goodhue (F) in June, 1796. Goodhue had resigned upon being elected to the Senate.
Election results
Two elections were held due to a majority not being achieved on the first vote.
Sewall took his seat on December 7, 1796
References
Massachusetts's 10th congressional district special election, 1796 Wikipedia(Text) CC BY-SA