No, I have not. And now I must make certain that I do. The combination of Mitchison and the Matter of Britain sounds like something one would not want to miss. "Very strange" makes it sound even more interesting.

I've actually begun a small project of creating a collection of 20th century Arthurian fiction. I'm not trying to be exhaustive, by any means - I'm just collecting the works that I like, for one thing - but everyone needs a project or two to amuse them, and this one amuses me.

So your mention of Mitchison's book is doubly welcome.