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 when this has been done new materials for making a general picture of the relative prosperity of different areas are available, as well as data for the comparative study of varying geographic and economic factors. The whole work, The Domesday Geography of England, will be in six volumes. In them different experts are to be allotted large distinct districts under Professor Darby's editorship. He will himself draw together all the threads, and write the concluding chapters of each volume and the whole of the concluding volume. The book will be fully illustrated by many maps, all specially drawn under the general editor's supervision. The volumes will be separately available, though the first contains some general introductory matter relevant to the whole work.