The Historical Methods journal has published an article by Humphrey on the development of our statistical database.
Southall, H. (2011) ‘Rebuilding the Great Britain Historical GIS, Part 1:
Building an Indefinitely Scalable Statistical Database’ in Historical Methods: A Journal of Quantitative and Interdisciplinary History, 44:3, pp149-159, published by Routledge.
Journal Information: http://www.tandf.co.uk/journals/titles/01615440.asp