[Frumious Bandersnatch]

If you are talking about "The Lady of the Lake," then I believe that you have it backwords.  Lancelot gave Excalibur to the Lady of the Lake.  King Arthur took the sword from the stone.  I believe that it was Merlin (a priest of the "High Church" and Arthur's uncle who predicted the rise and fall of Arthur Pendragon after the death of Arthur's father.  Anyways, so goes the legend.

[Heyworth]

Um. It's a quote from "Monty Python and the Holy Grail." In the words of Foghorn Leghorn, "I say, I say, that's a joke, son."