Posted: Jul 04, 2019 6:47 pm
by Thomas Eshuis
hackenslash wrote:My explanation is that Simon de Montfort (1208-1265) knew about it and incorporated it into his writings, which were the source of the modern legend, compiled by Thomas Mallory in the 15th century.

There are those hereabouts who will recall that I spent more than five years tracking Arthurian tales to source. I considered writing a book about it at one point.

It's possible, but the traditional importance of stones and swords was not strange to Celtic history:
https://www.irishtimes.com/culture/art-and-design/a-history-of-ireland-in-100-objects-1.613295