Daniel O'Connell, the "The Liberator", had a famous duel with John D'Esterre in Lyons Estate in 1815. The duel was organised to settle their differences which was the code governing the conduct of gentlemen at that time. D'Esterre was fatally wounded in the duel and died two days later. O'Connell was conscience stricken and is said to have regretted the incident for the rest of his life. When attending religious services afterwards he always wore a black glove on his right hand.