>This is Margaret Murray's thesis in The Witch Cult in Western Europe
>(incidentally, H.P. Lovecraft's inspiration for The Call of
>Cthulhu). I thought this idea is generally believed to have been refuted?
Murray was refuted because of the way she used source material. Ginzburg said she had a good hunch but agreed that she was not critical enough, or at all, with source material.
What Ginzburg came up with is so much better and different that there is really no comparison.