Cilley died in office after sustaining a fatal wound in a duel with Congressman
William J. Graves of
Kentucky. The climate surrounding the
Twenty-fifth U.S. Congress was one of increasing
political partisanship. Majority
Democrats fought with minority
Whigs over the response to the
Panic of 1837, which was generally blamed on the policies of Democratic President
Martin Van Buren. Underlying this conflict was lingering bitterness over the decision of Van Buren's predecessor, Democrat
Andrew Jackson, not to re-charter the
Second Bank of the United States. One of the pillars of the Whig press was the
New York Courier and Enquirer, a newspaper edited by
James Watson Webb. Democrats, including Jonathan Cilley, considered Webb's coverage of Congress to be biased and unfair; Cilley vented some of his party's bitterness in remarks made on the
House floor, and suggested that Webb's change from opposing to supporting the re-chartering of the bank came about because Webb received loans from the bank totaling $52,000. Webb, who considered himself insulted by Cilley's suggestion of
quid pro quo corruption, persuaded a Whig friend, Congressman
William J. Graves, to deliver Webb's challenge to a duel. Cilley refused to accept the letter, in terms which Graves decided were an insult to
his honor; Graves then challenged Cilley, and Cilley felt honor bound to accept. Dueling was prohibited within the boundaries of the
District of Columbia, so the participants and their seconds –
George Wallace Jones for Cilley and
Henry A. Wise for Graves – arranged to meet on February 24, 1838, at the
Bladensburg Dueling Grounds, just outside the city limits and inside the
Maryland border. As the challenged party, Cilley had the choice of weapons. Because of Graves' reputation as an expert pistol shot, Cilley selected rifles, with the distance between the duelists to be 80 yards, a distance far enough apart to negate Graves' supposed shooting skill; in actuality, the marked off distance was 94 yards. After their first fire missed, the participants shortened the distance and fired again, but again both shots missed. On the third exchange of shots, Graves fatally wounded Cilley by shooting him through the
femoral artery. Cilley bled to death on the dueling ground within a matter of minutes. He was buried at
Congressional Cemetery, and re-interred at Elm Grove Cemetery in
Thomaston, Maine. ==Legacy==