Question: What is the date of death of Augusta Leigh's father?
Answer: 2 August 1791

Captain John Byron (7 February 1756 – 2 August 1791) was a British Army officer and writer, best known as the father of poet Lord Byron. Augusta Maria Leigh ("née" Byron; 26 January 1783 – 12 October 1851) was the only daughter of John "Mad Jack" Byron, the poet Lord Byron's father, by his first wife, Amelia, née Darcy (Lady Conyers in her own right and the divorced wife of Francis, Marquis of Carmarthen).