James Joseph Sheahan, T. Whellan (the University of Wisconsin – Madison) + books.google.co.uk websiteHistory and topography of the city of York: the Ainsty wapentake; and the East riding of Yorkshire; embracing a general review of the early history of Great Britain, and a general history and description of the county of York, Volume 2 (Google eBook) Printed by J. Green, 1856 [Retrieved 2011-12-17]
