The Origins and Development of English Folk Plays
Peter Thomas Millington
Ph.D. Thesis, University of Sheffield, May 2002
This genealogical diagram was determined from examining the likely ancestral links between the various folk play groups, on the basis of shared lines and variations in wording. A key element is the proposed proto-text of which there is of course not yet a specific real example. The Northern English group of plays is perhaps the closest to it.