withdrew their support of King's College London in response to Wellington's support of Catholic emancipation. In a letter to Wellington, he accused the Duke to have in mind "insidious designs for the infringement of our liberty and the introduction of Popery into every department of the State". The letter provoked a furious exchange of correspondence and Wellington accused Winchilsea of imputing him with "disgraceful and criminal motives" in setting up King's College London. When Winchilsea refused to retract the remarks, Wellington – by his own admission, "no advocate of duelling" and a virgin duellist – demanded satisfaction in a contest of arms: "I now call upon your lordship to give me that satisfaction for your conduct which a gentleman has a right to require, and which a gentleman never refuses to give."
The result was a duel in Battersea Fields on 21 March 1829. Winchilsea did not fire his pistol, a plan he and his second almost certainly decided upon before the duel; Wellington took aim and fired wide to the right. Accounts differ as to whether Wellington missed on purpose. Wellington, noted for his poor aim, claimed he did, other reports more sympathetic to Winchilsea claimed he had aimed to kill. Honour was saved and Winchilsea wrote Wellington an apology. Every year, "Duel Day" is commemorated on the first Thursday following March 21, featuring a range of events across King's, including reenactments.
=== 19th century ===
King's opened in October 1831 with the cleric William Otter appointed as first principal and lecturer in divinity. The Archbishop of Canterbury presided over the opening ceremony, in which a sermon was given in the chapel by Charles James Blomfield, the Bishop of London, on the subject of combining religious instruction with intellectual culture. Despite the attempts to make King's Anglican-only, the initial prospectus permitted, "nonconformists of all sorts to enter the college freely". William Howley: the governors and the professors, except the linguists, were required to be members …
