My first intention was to reach the left bank and proceed to the Abbey of St. Genevieve. But it occurred to me that, although a boat could not pass down the river, out of Paris, at night, because of the chain stretched across the river from the Tour du Coin to the Tour de Nesle, yet a swimmer might pass under or over that chain and then make, through the faubourg outside the walls, for the open country. Neither Marguerite nor I had thought of this way of leaving Paris, because of the seeming impossibility of a man's surviving a swim through the icy Seine, and a flight in wet clothes through the February night. Moreover, there was the necessity of leaving my sword behind, and the danger of being seen by the men on guard at the towers on either side of the river. But now that necessity had driven me into the river, I chose this shorter route to freedom, and swam with the current of the Seine. In front of me lay a dark mass upon the water in the middle of the river. This was the barge moored there to support the chain which stretched, from either side, across the surface of the water, up the bank and to the Tour de Nesle on the left side, and to the Tour du Coin on the right. I might pass either to the right or to the left of this barge. Naturally, I chose to avoid the side nearest the bank from which I had just fled, and to take the left side, which lay in the shadow of the frowning Tour de Nesle. By swimming close to the left bank of the river, I might pass the boundary without diving under the chain, for the chain ascended obliquely from the water to the tower, leaving a small part of the river's surface entirely free. But this part was at the very foot of the tower, and if I tried passage there I should probably attract the attention of the guard. I was just looking ahead, to choose a spot midway between the barge and the left bank, when suddenly the blackness went from the face of things, a pale yellow light took its place, and I knew that the moon had come from behind the clouds. A moment later, I heard a cry from the right bank of the river, and knew that I was discovered. The shout came from the soldiers whom I had so narrowly eluded. I knew that it was a race for life now. The soldiers would know that any man swimming the Seine on a February night was a man whom they ought to stop. I did not look back,--the one thing to do was to pass the Tour de Nesle before the guards there should be put on the alert by the cries from the right bank. So on I swam, urging every muscle to its utmost.