Leonard McNally

Leonard McNally
Leo. MacNally Esq.
Born	27 September 1752 Dublin, Kingdom of Ireland
Died	13 February 1820 (aged 68) Dublin, United Kingdom
Burial place	Donnybrook, County Dublin, Ireland
Spouses	Mary O'Brien ​ ​ (m. 1783; d. 1786)​ Frances l'Anson ​ ​ (m. 1787; d. 1795)​ Louisa Edgeworth ​ (m. 1799)​

Leonard McNally or MacNally (27 September 1752 – 13 February 1820)^[1] was an Irish barrister, playwright, lyricist, founding member of the United Irishmen and spy for the British Government within Irish republican circles.

He was a successful lawyer in late 18th and early 19th century Dublin, and wrote a law book that was crucial in the development of the "beyond reasonable doubt" standard in criminal trials. However, during his time, he was best known for his popular comic operas and plays, together with his most enduring work, the romantic song "The Lass of Richmond Hill". He is now mainly remembered as a very important informer for the British government within the Irish revolutionary society, the United Irishmen and played a major role in the defeat of the Irish Rebellion of 1798. In return for payments from the government, McNally would betray his United Irishmen colleagues to the authorities and then, as defence counsel at their trial, secretly collaborate with the prosecution to secure a conviction. His notable republican clients included Napper Tandy, Wolfe Tone, Robert Emmet and Lord Edward FitzGerald.