April 11

Battle of the Braes in which crofters in Skye fought 50 policemen during a dispute over land rights

Kathleen Daly Clarke, Irish patriot, is born

John Galt, author, traveller, founder of Guelph, Ontario, died.

Richard Levinge, an Irish MP, who had been committed to the Tower of London, is released

Richard Levinge, an Irish Member of Parliament and prominent lawyer, was committed to the Tower of London by the English House of Commons during the late 17th century—likely in connection with political tensions involving the constitutional relationship between England and Ireland.

Scottish settlement in Darien, Panama, abandoned.

Catholic worship is re-established in Kilkenny and the main Munster towns

Llywelyn the Great died.

Llywelyn ab Iorwerth (c. 1173–April 11, 1240) was a Prince of Gwynedd: and eventually ruler over much of Wales. Llywelyn was a decendant of the senior line of Rhodri Mawr, thus a member of the princely house of Aberffraw. Although he is often referred to as a Prince of Wales, his official title was Prince of Aberffraw and Lord of Snowdonia (the first official Prince of Wales was his son, Dafydd). He was also known as Llywelyn the Great or, in Welsh, Llywelyn Fawr, one of only two Welsh rulers to bear this title, the other being Rhodri the Great.