The Reformers were actually renewing the civil war on charges so stale and so false.

The Duke had possibly promised to desert her if she broke the truce, and now he seized on the flimsy pretence, because the Congregation, as the leaders said, had "tempted him" sufficiently.

They had come up to his price.

Arran, the hoped-for Hamilton king, the hoped-for husband of the Queen of England, had arrived, and with Arran the Duke joined the Reformers.

About September 20 they forbade the Regent to fortify Leith.
The brethren say that they have given no "provocation." Six weeks earlier they had requested England to help them to seize and hold Broughty Castle, though the Regent may not have known that detail.
The Regent replied as became her, and Glencairn, with Erskine of Dun, wrecked the rich abbey of Paisley.