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Rh enemy, continued inactive in those narrow streights where its superiority of numbers was of little use or advantage. Crispus, the emperor's eldest son, was intrusted with the execution of this daring enterprise, which he performed with so much courage and success, that he deserved the esteem, and most probably excited the jealousy, of his father. The engagement lasted two days, and, in the evening of the first, the contending fleets, after a considerable and mutual loss, retired into their respective harbours of Europe and Asia. The second day about noon a strong south wind sprang up, which carried the vessels of Crispus against the enemy; and, as the casual advantage was improved by his skilful intrepidity, he soon obtained a complete victory. An hundred and thirty vessels were destroyed, five thousand men were slain, and Amandus, the admiral of the Asiatic fleet, escaped with the utmost difficulty to the shores of Chalcedon. As soon as the Hellespont was open, a plentiful convoy of provisions flowed into the camp of Constantine, who had already advanced the operations of the siege. He constructed artificial mounds of earth of an equal height with the ramparts of Byzantium. The lofty towers which were erected on that foundation galled the besieged with large stones and darts from the military engines, and the battering rams had shaken the walls in several places. If Licinius persisted much longer in the defence, he exposed himself to be involved in the ruin of the place. Before he was surrounded, he prudently removed his person and treasures to Chalcedon in Asia; and, as he was always desirous of associating companions to the hopes and dangers of his fortune, he now bestowed the title of Cæsar on Martinianus, who exercised one of the most important offices of the empire.

Such were still the resources, and such the abilities, of Licinius, that, after so many successive defeats, he collected in Bithynia a new army of fifty or sixty thousand men, while the activity of Constantine was employed in the siege of Byzantium. The vigilant emperor did not, however, neglect the last struggles of his antagonist. A considerable part of his victorious army was