The Thames Valley offers one of the richest resources of archaeological data in the country. This volume providesd a detailed overview of the late Iron Age, Roman and Anglo-Saxon periods in the Upper and Middle Thames Valley, from the source of the river in Gloucestershire to the start of the tidal zone at Teddington Lock. Following a thematic structure, it offers an up to date account of the changing environment of the valley, evolving settlement patterns, the identity, beliefs and culture of the valley's inhabitants, their agriculture and industry, and the archaeology of power and politics in the region. Much of the evidence has been recovered during extensive gravel quarrying.