Following on from his exploration of the role of water transport in the west of Britain, James Ellis Jones here broadens his scope to provide a synthesis of archaeological work on the maritime and riverine landscape and its full range of roles across the province of Britannia. After surveying the coastal landscape and the boats and ships in use during the Roman period, Jones first explores the military role of the sea, in supplying the army and for naval and amphibious operations. He then analyses the importance of sea and riverine transport for trade, both internal and in terms of imports and exports. A gazetteer of prominent coastal sites completes the volume.