Old Series to Explorer: A Field Guide to the Ordnance Map

vi, 154 pages : colour illustrations, colour maps ; 25 cm. Described as a field guide , the book is intended to help readers identify and put into context any sheets that they may come across. Colour has been used liberally to illustrate both the maps and their covers. There is also a complete set of index diagrams for each series, together with enough about the history and processes of the Ordnance Survey to understand why their maps looked as they did. Finally, there are chapters on mapmakers at war and on collecting maps.