A special election was held in Massachusetts's 3rd congressional district on December 15, 1800 to fill a vacancy left by the resignation of Samuel Lyman (F) on November 6, 1800
Election results
Mattoon took his seat on February 2, 1801. Mattoon had also been elected to the same district for the 7th Congress.
References
Massachusetts's 3rd congressional district special election, 1800 Wikipedia(Text) CC BY-SA