John Lesley (or Leslie) (29 September 1527 – 31 May 1596) was a Scottish Roman Catholic bishop and historian. His father was Gavin Lesley, rector of Kingussie, Badenoch. Early career He was educated at the University of Aberdeen, where he took the degree of M.A. In 1538 he obtained a dispensation permitting him to hold a benefice, notwithstanding his being a natural son, and in June 1546 he was made an acolyte in the cathedral church of Aberdeen, of which he was afterwards appointed a canon and prebendary. He also studied at Poitiers, at Toulouse and at Paris, where he was made doctor of laws in 1553. In 1558 he took orders and was appointed Official of Aberdeen, and inducted into the parsonage and prebend of Oyne. At the Reformation Lesley became a champion of Catholicism. He was present at the disputation held in Edinburgh in 1561, when Knox and Willox were his antagonists. He was one of the commissioners sent the same year to bring over the young Mary, Queen of Scots, to take the government of Scotland. He returned in her train, and was appointed a privy councillor and professor of canon law in King's College, Aberdeen, and in 1565 one of the senators of the college of justice. Shortly afterwards he was made abbot of Lindores, and in 1565 bishop of Ross, the election to the see being confirmed in the following year. He was one of the sixteen commissioners appointed to revise the laws of Scotland, and the volume of the Actis and Constitutiounis of the Realme of Scotland known as the Black Acts was, chiefly owing to his care, printed in 1566. Later career The bishop was one of the most steadfast friends of Queen Mary. After the failure of the royal cause, and while Mary was a captive in England, Lesley (who had gone to her at Bolton) continued to exert himself on her behalf. He was one of the commissioners at the conference at York in 1568. He appeared as her ambassador at the court of Elizabeth I to complain of the injustice done to her, and when he found he was not listened to he laid plans for her escape. He also projected a marriage for her with Thomas, Duke of Norfolk, which ended in the execution of that nobleman. For this he was put under the charge of the bishop of