This map shows the locations of the sources listed by E.K.Chambers in his book The Mediaeval Stage (1903), using geographical coordinates and data in Electronic ERD (Cawte et al, 2007).
Compare with the equivalent map for his later list in E.K.Chambers (1933).
E.C.Cawte, A.Helm & N.Peacock
Electronic ERD: An Index to English Folk Drama
Internet URL: http://www.mastermummers.org/erd/, 2007, accessed 21st Jan.2021
Edmund Kerchever Chambers
The Mediaeval Stage: Vol.1
London: Oxford University Press, 1903