First paragraph: cursory summary; second, critical judgment.
A kind of weird Waverly novel, set at the time of Robert Bruce and his battle for Scottish independence from the England of Edward I (Edward Longshanks). Ostensibly a love story, it tells the tale of Lady Augusta, a fair maiden who has pledged to marry any English knight who can keep and hold the landmark of the title for a year. She has in mind John de Walton, a knight who is in possession of the castle at the beginning of the story, assisted by his lieutenant, the newly knighted Aymer de Valance. The latter allows a traveling minstrel to stay at the castle, thus occasioning a serious rift between the two English knights. Meanwhile, the minstrel's 'son', Augustine, is boarded at a nearby monastery, where English monks and nuns reside. In reality, Augustine is Augusta, come to see if de Walton is making good on his pledge. Sir James Douglas, who feels the castle, which once was held by his father, is in fact his, is a supporter of Bruce.
Eventually, it comes down to a climatic sword fight between Douglas and de Walton, which is inconclusive. Word arrives that Bruce's forces defeated those of the Earl of Pembroke at the Battle of Loudon Hill, thus implying that the looked for support from English reinforcements upon which de Walton had counted would not be coming. In fact, Pembroke orders de Walton to surrender the castle to Douglas. At this point, the latter passes the hand of Augusta to his recent foe, and despite his not having held the castle, the lovers are united.
Only about 300pp. in length, and only having about 20 pp. of the actual sword fight, the novel is more one of temperament than of action, particularly in the long drawn out hostility over nothing, (at least as far as it seemed to me) engaged in for more than half the novel by Valance and Walton. A nice subplot of a disfigured nun who had not yet taken her final vows, her tragic story love lost and eventual re-uniting with her long-lost lover can't really save one from wondering what Scott thought he was trying to do with this novel. A focusing on the ideal attributes of character of the good knight might be a possible lietmotif, but even this is relatively undeveloped with the rather peremptory actions of its principal characters.
Definitely a three-starrer