Very slowly the boat drifted along her course, assisted occasionally by the men pushing with their poles against the foot of the wall that rose a few feet from them, while those with the fender stood in readiness to place them in position should the ship approach so close to the wall as to render contact probable. The captain was now at the tiller, the way given her by the poles being sufficient to enable him to keep her on her course close to the wall. Another quarter of an hour and they were at the end of the wall, for the forts at the entrance were detached. They were now approaching the most dangerous portion of the passage; they were no longer sheltered in the shadow, but must go along openly. It was, however, improbable that there would be sentries on the face of the fort looking towards the town, and Ned, accustomed as he was to keep watch on deck at night, could scarce make out the low shore a few yards away, and felt pretty confident that the eyes of the sleepy sentries would not be able to pierce the gloom.