While scholars consider Herford’s Mappa Mundi to be among the most important medieval English maps, for centuries there were no firmly grounded theories about its original placement or purpose. That changed when Terkla published detailed evidence intended to clear up the centuries-old mystery.
"Careful investigation and a bit of luck yield map’s secrets,"
Illinois Wesleyan University Magazine:
1, Article 7.
Available at: http://digitalcommons.iwu.edu/iwumag/vol16/iss1/7