Other resources
Notes on Corallian Sandy Building Stones by John Wright
The Mineral Industry of Great Britain, IV, Yorkshire. Transcript from The Quarry, Vol 5, 1900
The Use and Reuse of Building Stone: an archaeological survey by Emeritus Professor Ian J Windsor
The Methodology, History and Philosophy of Building Materials in Archaeology by Emeritus Professor Ian J Windsor
Discovery of Saxon church at Scrayingham - BBC News May 2010