Caesar's written account of Britain says that the Belgae of northeastern Gaul had previously conducted raids on Britain, establishing settlements in some of its coastal areas, and that within living memory Diviciacus, king of the Suessiones, had held power in Britain as well as in Gaul. British coinage from this period shows a complicated pattern of intrusion. The earliest Gallo-Belgic coins that have been found in Britain date to before 100 BC, perhaps as early as 150 BC, were struck in Gaul, and have been found mainly in Kent. Later coins of a similar type were struck in Britain and are found all along the south coast as far west as Dorset. It appears that Belgic power was concentrated on the southeastern coast, although their influence spread further west and inland, perhaps through chieftains establishing political control over the native population.