a set of editorial changes to rectify the Douglas family relationships; the Magnum material is included in Volume 25b. Plot introduction It is concerned mainly with Queen Mary's imprisonment at Loch Leven Castle in 1567, her escape, and her defeat. Parallel to this is the romance of Roland Graeme, a dim-witted but spirited youth. He is brought up at the castle of Avenel by Mary Avenel and her husband, Halbert Glendinning. Roland is sent by the Regent Murray to be page to Mary Stuart with directions to guard her. He falls in love with Catherine Seyton, who is one of the ladies-in-waiting to the queen. He is found later to be the heir to Avenel. Edward Glendinning, the brother of Halbert, is the abbot of the title, the last abbot of the monastery described in the preceding novel. Plot summary Ten years had passed since the final events of The Monastery, during which Halbert had been knighted for his services to the regent, and Lady Avenel had adopted Roland, whom her dog had saved from drowning. The boy grew up petted by his mistress, but disliked by her chaplain and servants; and at length, having threatened to dirk the falconer, he was dismissed to seek his fortune. He had been secretly taught the Romish faith by Father Ambrose, and led by his grandmother to believe that he was of gentle birth. She now introduced him to Catherine Seyton, and then accompanied him to the abbey, where the revels of some masqueraders were interrupted by the arrival of Sir Halbert on his way to Edinburgh, who attached the youth to his train. On reaching the capital he aided Lord Seyton in a street fray, and was introduced to the Earl of Murray, who desired him to be ready to travel at short notice. In company with Adam Woodcock he adjourned to an inn, and was entrusted by Henry Seyton (whom he believed to be Catherine in male attire) with a sword, which he was not to unsheath until commanded by his rightful sovereign. He then learnt that he was to be attached to the household of Queen Mary, and accompanied Lord Lindesay to the castle of Lochleven, situated on an island, where he found Catherine in attendance on her, and was present when, in compliance with a note contained in his sword-sheath, she signed her abdication at the behest of the