ten o'clock
Soon , however , they recovered from their astonishment , and steadily opened fire in return . The English guns now joined their voices to the concert , and for two hours the storm of fire continued unabating on both sides . After two hours and a half the din ceased , the French artillery-men waiting to allow their guns to cool . At ten o'clock the French again exploded some mines , and for two hours renewed their cannonade as hotly as ever . The Russians could be seen pouring troops across the bridge over the harbor from their camps on the north side , to resist the expected attack . From twelve to five the firing was slack . At that hour the French again began their cannonade as vigorously as before .