On 5 September 1571, he was chosen
Regent of Scotland, but he was overshadowed and perhaps slighted by
James Douglas, 4th Earl of Morton. Bell confessed, after torture, that he had shouted "Shoot the Regent!". As the
Marian Civil War continued, Mar came to Leith and made preparations to besiege Edinburgh and its castle, which was held for Queen Mary by
William Kirkcaldy of Grange. He placed artillery at the
Pleasance to the east of the city. The guns were brought from
Dumbarton Castle,
Stirling,
Dundee, and
Dunbar. Mar's guns were directed at first at Adam Fullerton's house, and then at the town wall. The walls were damaged but Mar gave up and returned to Leith. He sent to Queen
Elizabeth I for armed support from England, following Morton's advice. The King's cause suffered a number of reverses. At Aberdeen, the forces of Forbes family were defeated at the
battle of Craibstone and
Corgarff by the Marian
Adam Gordon of Auchindoun.
Broughty Castle near
Dundee fell to the Marian Laird of Parbroath.
Lord Maxwell planned to marry Elizabeth Douglas at
Dalkeith but Marian forces ambushed those carrying food, silver ware, and wine to the banquet at the
handfasting. Queen Elizabeth sent two ambassadors to Scotland,
Thomas Randolph to speak with Regent Mar, and
Henry Carey, Marshall of
Berwick to the Laird of Grange in Edinburgh Castle. Mar was in touch with
William Cecil and
William Drury in England, particularly by letters and messages carried by
Nicolas Elphinstone. On 1 August 1572, he declared a two-month truce with the Queen's party, known as an Abstinence. He wrote in September to
Margaret Douglas, Countess of Lennox about the progress of the Abstinence and the mint operated in Edinburgh Castle by his enemies. Mar assured her that her grandson, the six-year-old
James VI, would soon be able to speak to her for himself. At this time he was disturbed by news that one of the
jewels of Mary, Queen of Scots had been marketed in France and sold to
Charles IX. Mar's last surviving letter to Cecil expressed his hopes to settle border disputes during the continued abstinence. Queen Elizabeth wrote to congratulate him on becoming Regent on 2 October and discuss the "pernicious practices" of Mary, Queen of Scots, to regain power to the prejudice of her son James VI. She urged him to punish and execute anyone implicated in the murder of Regent Lennox. == Death ==