Radoub had noticed that the deep fissure caused by the explosion of the mine extended from the breach to that loop-hole on the first story whose iron grating had been shattered and partially torn off by a cannon-ball, and thus hanging, the network of broken bars left just room enough for a man to pass through,--provided he could climb up to it; and that was the question. Possibly it might be done by following the crack, supposing the man to be a cat; and Radoub was precisely like a cat. He was of the race which Pindar calls "the agile athletes." Although a man may be an old soldier, it by no means follows that he is no longer young. Radoub, who had been in the French Guards, was not yet forty years of age, and he was as active as Hercules. Laying his musket on the ground, he removed his shoulder-belt, threw off his coat and waistcoat, keeping only his two pistols, which he stuck in the belt of his trousers, and his drawn sabre, which he held between his teeth. The butts of his pistols projected from above his belt. Thus burdened by no unnecessary weight, and followed in the darkness by the eyes of all those of the attacking column who had not as yet entered the breach, he began the ascent, climbing the stones of the cracked wall as though they had been the steps of a staircase. It was an advantage to him that he wore no shoes; there is nothing like a naked foot for clinging, and he twisted his toes into the holes between the stones. While hoisting himself by means of his fists, he used his knees for support. It was a hard pull, not unlike climbing up the teeth of a saw. "Luckily," he thought to himself, "there is no one in the room on the first story; for if there were, I should never have been allowed to climb up in this way." He had about forty feet to climb after this fashion, and, as he advanced, somewhat inconvenienced by the projecting butts of his pistols, the crack grew narrower and the ascent more and more difficult. The increasing depth of the precipice beneath his feet added constantly to the danger of a fall; but at last he reached the edge of the loop-hole, and on pushing aside the twisted and broken grating he found that he had ample room to pass through. Then raising himself by a powerful effort, he braced his knees against the cornices of the ledge, caught hold of a fragment of the grating on either hand, and holding his sabre between his teeth, he drew himself up as high as his waist in front of the embrasure of the loop-hole; there, with his entire weight resting on his two fists, he hung suspended over the abyss. Now, with a single bound, he had but to leap into the hall of the first story. Suddenly he beheld in the gloom a horrible object; a face appeared in the embrasure, like a bleeding mask with its jaw crushed and one eye torn out, and this one-eyed mask was gazing steadily at him.