A special election was held in Ohio's 10th congressional district on October 10, 1826, the same day as the general elections for the 20th Congress, to fill a vacancy caused by the resignation of David Jennings (A) on May 25, 1826
Election returns
Shannon took his seat on December 4, 1826, and served only for the remainder of the 19th Congress. He did not run in the general election for the 20th Congress.
References
Ohio's 10th congressional district special election, 1826 Wikipedia(Text) CC BY-SA