The Domesday Book has long been used as a source of information about legal and economic matters, but its bearing upon the geography of medieval England has been comparatively neglected. The extraction of geographical information involves problems of interpretation, since it necessitates an analysis into elements and their subsequent reconstruction on a geographical basis. But this process makes available new materials for forming a general picture of the relative prosperity of different areas, as well as for data for the comparative study of varying geographic and economic factors. This volume on the northern counties of England contains chapters on Yorkshire by I. S. Maxwell, Nottinghamshire, Cheshire, and Lancashire by I. B. Terrett, Derbyshire by Dr Holly and the Northern Counties by H. C. Darby.