At half-past six a body of French troops were observed to leave their trenches, and, in skirmishing order, to make their way towards the Mamelon. The guns of the Russian fort roared out, but already the assailants were too close for these to have much effect. Soon a great shout from the spectators on the hill proclaimed that the Zouaves, who always led the French attacks, had gained the parapet. Then, from within, a host of figures surged up against the sky, and a curious conflict raged on the very summit of the work. Soon, however, the increasing mass of the French, as they streamed up, enabled them to maintain the footing they had gained, and pouring down into the fort, they drove the Russians from it, the French pouring out in their rear. Twice fresh bodies of Russian reserves, coming up, attempted to roll back the French attack; but these, exultant with success, pressed forward, and, in spite of the fire which the guns of the Round Tower fort poured upon them, drove their enemies down the hill. It was growing dark now, and it could with difficulty be seen how the fight was going. Fresh masses of French troops poured from their advance trenches into the Mamelon, and there was no question that that point was decidedly gained.