The Ordovices had been most stubborn in their opposition, and most difficult to restrain within bounds. In a short but decisive campaign Agricola so severely chastised them that his biographer says that he almost literally exterminated them. This is certainly an exaggeration, but it implies the hewing to pieces of the chiefs and free men capable of bearing the sword who fell into his hands. Cæsar had treated the Cadurci, after their gallant stand at Uxellodunum, in the same way, and again the Veneti of Armorica, without a shadow of compunction. Whatsoever people opposed Rome was guilty of a capital crime, and must be dealt with accordingly. Agricola now pushed on to the Menai Straits, beyond which he could see the undulating land of Mona, the shore lined with Britons in paint, and brandishing their weapons, whilst behind them were ranged the Druids and bards inciting them to victory with their incantations and songs. We can determine with some confidence the spot where Agricola stood contemplating the last stronghold of the Briton and its defenders. It was at Dinorwic, where now plies a ferry. He waited till the strong current of the tide had run to exhaustion and left a long stretch of sand on the further side. The Britons seeing that he was without ships feared nothing. But they were speedily convinced of their mistake. Agricola’s auxiliaries, probably natives of the low lands at the mouth of the Rhine, had no fear of the water, plunged in, and gallantly swam across the channel. A massacre ensued; the island was subjugated, and Roman remains found on it in several places testify that the conquerors of the world planted troops there in camp to keep Mona in complete control. They worked the copper mines near Amlwch. [Illustration: SERIGI. A STATUE AT CAERGYBI]