Morgan le Fay’s Poisoned Mantle Plot turns a lavish gift into evidence of attempted murder. After Morgan le Fay’s earlier treachery has come to light, she sends King Arthur a jeweled mantle under the appearance of apology and reconciliation. The Damsel of the Lake warns Arthur not to wear it; he tests the messenger instead, and her death reveals the danger. The episode brings Morgan le Fay’s threat into the open while deepening suspicion and division at court.

Background: Treachery and a Gift

The mantle arrives after Arthur has returned to court from a series of strange adventures and Manassen has reported what happened in connection with Morgan le Fay. Her deception has stirred anger among the knights, several of whom wish to see her punished. Arthur himself declares his intention to take vengeance if he lives. The danger, then, is not introduced as an isolated mystery: the court already knows Morgan le Fay has acted against him, and the gift arrives in that unsettled aftermath.

The next morning a damsel sent by Morgan le Fay presents a mantle of extraordinary richness, set so densely with precious stones that Arthur has never seen its like. She says her sender wishes him to accept it and will make amends for whatever offense he names. The beauty and value of the object give the offer the appearance of generosity, but the timing makes its professed purpose—reconciliation—uncertain.

The Warning and the Test

The Damsel of the Lake asks to speak to Arthur privately and advises him not to put on the mantle or let any of his knights wear it. She tells him to require the bearer to try it on first. Arthur follows that counsel rather than accepting the gift at face value, and orders Morgan le Fay’s messenger to wear the garment herself.

The damsel objects that a king’s garment is not fitting for her. Arthur insists that it must be put on her before it comes near him or anyone else at court. As soon as the mantle is placed on her, she falls dead. The test converts suspicion into proof within the scene: the offered gift is dangerous, and the messenger who brought it suffers the consequence intended for its recipient.

Exposure and Consequences at Court

Arthur is more angry after the messenger’s death than he was before. He addresses King Uriens, Morgan le Fay’s husband, and says that his wife is continually seeking to betray him. He distinguishes Uriens from the accusation, noting that Accolon had confessed Morgan le Fay would have destroyed Uriens as well as Arthur. But Arthur suspects Uriens’s son, Sir Uwaine, of being involved and orders him to leave court.

Sir Gawaine responds by declaring that if his cousin is banished, he will leave too. The two knights depart together. Their departure makes the poisoned gift’s consequences reach beyond the failed attack: the affair produces a new rupture within Arthur’s court, even as Arthur’s suspicion does not extend equally to every member of Morgan le Fay’s family.

Significance

The episode hinges on a contrast between appearance and intention. A gift presented as a means of making amends is instead a concealed threat; the mantle’s precious stones cannot make it safe. The Damsel of the Lake’s warning allows Arthur to turn the danger back upon the messenger, but this does not restore trust. The plot exposes Morgan le Fay’s continued hostility and shows how an attempted private betrayal can unsettle the wider court, driving Sir Uwaine and Sir Gawaine away from Arthur.