James Boswell, 9th Laird of Auchinleck (/ˈbɒzwɛl, -wəl/; 29 October 1740 (N.S.) – 19 May 1795), was a Scottish biographer, diarist, and lawyer, born in Edinburgh. He is best known for his biography the English writer Samuel Johnson, Life of Samuel Johnson, which is commonly said to be the greatest biography written in the English language. A great mass of Boswell's diaries, letters, and private papers were recovered from the 1920s to the 1950s, and their ongoing publication by Yale University has transformed his reputation.
Boswell was born in Blair's Land on the east side of Parliament Close behind St Giles' Cathedral in Edinburgh on 29 October 1740 (N.S.). He was the eldest son of a judge, Alexander Boswell, Lord Auchinleck, and his wife Euphemia Erskine. As the eldest son, he was heir to his family's estate of Auchinleck in Ayrshire. Boswell's mother was a strict Calvinist, and he felt that his father was cold to him. As a child, he was delicate. Kay Jamison, Professor of Psychiatry at Johns Hopkins, in her book Touched with Fire, believes that Boswell may have suffered from bipolar disorder, and this condition would afflict him sporadically all through his life. At the age of five, he was sent to James Mundell's academy, an advanced institution by the standards of the time, where he was instructed in English, Latin, writing and arithmetic.