178 MATTHEW OF WESTMINSTER. A.D. 299. arrived in the island, fought a battle and killed Carausius. After that, he made great slaughter among the Britons, who, having deserted the republic, had submitted themselves to the commands of Carausius. And then, having himself assumed the crown of the kingdom, he held the island for three years. A.D. 293. Diocletian ordered jewels to be inserted in his garments and shoes, a thing which none of his predecessors had done, as hitherto the emperors had worn only the plain purple. A.D. 294. Asclepiodotus, duke of Cornwall, coming as an ally of the Britons, attacked Alectus while he was at London offering sacrifices to his national gods. But Alectus, as soon as he was informed of the arrival of Asclepiodotus, left the sacrifice, and went forth against him, and having fought a very severe battle, he was put to flight by Asclepiodotus, and all his army was routed. And as they fled, the Britons slew many thousands of them, and Alectus himself. But Lenius Gallus, the colleague of Alectus, collected the rest of the Romans in the city of London, to resist Asclepiodotus, and avoid the death that threatened them. Therefore the Britons attacked the city with great vigour, and endeavoured to batter down the walls. And forming in close line o f battle, they attacked the Romans, and in one day slew them all, at the torrent below the city which the Britons afterwards called Nantgallus, from the name of the general, but in Saxon it was styled Walbroke. A.D. 295. Asclepiodotus, with the consent of the people, took the crown of Britain, and reigned with great uprightness for ten years. A.D. 296. Constantius married the step-daughter o f Herculeus Maximianus, whose name was Theodora. And by her he had six sons, the brothers of Constantine. A.D. 297. Constantius Cœsar had his army so completely routed in his first battle against the Alemanni, that he could scarcely eecape himself; but he retrieved his fortunes b y a subsequent victory so complete, that seventy thousand of the Alemanni are said to have been slain in a few hours. A.D. 298. Maximianus Herculeus subdued Achilleus, wh o was rebelling against the Romans in Egypt, and the Quinquegentiani. A.D. 299. Diocletian took Achilleus, who had been besieged at Alexandria eight months, prisoner, and put him to death.