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 close contact with the obstructive barrier. Then the boat was set alight and launched on to the top of one of the enemy's towers, which took fire and was consumed with two hundred of its occupants. One detail only of the manœuvres failed of accomplishment; Bessas never moved, wholly engrossed as he was with his mercenary avidity.

Suddenly, when success appeared to have been almost attained, the operations were abandoned and Belisarius drew off his forces without attempting to push his advantage. Antonina, though unwittingly, was the cause of this disastrous collapse. While the assault was proceeding a glowing account of the victorious progress of the Byzantines was brought to Portus, whereupon Isaac, inflamed with ardour, collected a hundred cavalry, and made a dash for a section of the Gothic army which was encamped near Ostia. At first the enemy were dispersed, but they shortly rallied, and, recognizing the paucity of their adversaries, charged them, with the result that many were slain, while Isaac and some others were captured. A few, however, escaped, who rode full speed to Belisarius and informed him that Isaac was taken prisoner. The general, without stopping to inquire, immediately sounded the signals of retreat, and made all haste to Portus, concluding that his wife had fallen into the hands of the Goths. There he learned the true details as to the temerity of Isaac, which affected him so deeply that he became seriously ill, and was incapacitated for some time from taking the field. Such was the last effort to save Rome from being retaken by the Goths, and before long Totila succeeded in making himself master of the city.

Nothing could have been more languid and ill organized than the defence of Rome under Bessas. The garrison lost all sense of discipline, no strict watch was kept, and the