A selection of links

Women have been morris dancing since the middle ages: and anyone who says differently doesn't know any better. New Esperance Morris have been an female side, in London, since the 1960s, and we draw on the heritage of Mary Neal's Esperance Dancers.

Cliff Stevens' Explanation

Another Explanation

Pilgrim Morris Men

The Normal Person's Guide to Morris

And something slightly less 'historical'

Bampton Bugle