Great Britain and Ireland enjoy a rich cartographic heritage, yet historians have not made full use of early maps in their writings and research. This is partly due to a lack of information about exactly which maps are available. With the publication of this volume from the Royal Historical Society, we now have a comprehensive guide to the early maps of Great Britain. The book is divided into two parts: part one describes the history and purpose of maps in a series of short essays on the early mapping of the British Isles; part two comprises a guide to the collections, national and regional. Now available from Cambridge University Press, this volume provides an essential reference tool for anyone requiring to access maps of the British Isles dating back to the medieval period and beyond.