It was originally intended that this should be a general work on Roman Britain, but it was soon evident that it was impossible to compress so large a subject into a volume of this size, and at the same time do reasonable justice to that phase of it - the towns, forts, houses, and other structural remains - which in so marked a manner has been enlarged and modified by the systematic use of the spade during the last quarter of a century.

Preface.

The military works of the Roman era in this country consist of fieldworks or camps, raised during the campaigns against the natives; forts to hold secure what the sword had won; frontier defences, and the fortifications of towns.

Chapter I, Camps : the camps of classical writers and British examples.