In April, 1821, prior to the first meeting of the 17th Congress,[1] Representative-elect James Duncan (DR) from Pennsylvania's 5th district resigned. A special election was held to fill the resulting vacancy on October 9, 1821.
- ^ "Seventeenth Congress March 4, 1821, to March 3, 1823" (PDF). Office of the Historian, United States House of Representatives. Archived from the original (PDF) on December 13, 2012. Retrieved December 14, 2012. footnote 46