Unlike the wall they had left, the forts stood at a little distance back from the water, and Ned was sure that as he could scarce make out the outline of the one nearest to them, no one upon its wall could distinguish the tracery of the masts and rigging of the boat. The mist had thickened since they had started, and coming on heavier just at this point the fort was presently entirely obscured. Another twenty minutes passed. They must be now, Ned knew, in the course of the river; and he began to think that the danger was over, when a dark object suddenly appeared from the mist, close at hand. In another moment there was a shock, and then a long grinding motion as the boat swept along by the side of a large ship. Following the shock came a sharp challenge from the darkness above, followed by other shouts. Obedient to orders they had received, no sound was heard from the smack. Each man stooped low under the bulwarks. Two or three shots rang out from the ship, and there was a hail in Dutch--"Stop, or we will sink you." Ned knew that this was an idle threat. The vessel was lying head to the tide, and only a small gun or two in the stern could be brought to bear, and already the ship was lost to sight in the mist. There was much shouting and noise heard astern, and then the creaking of blocks. Ned made his way aft. "The game is up," the skipper said. "They will be alongside in a few minutes. Dark as it is they cannot miss us. They will know that we must have drifted straight down. We must take to the boats and row for it." "I should say, captain," Ned said, "we had best take to the boat and row off for a short distance, and then wait. As likely as not they may think when they board her that she has simply drifted out from the town, having been carelessly moored. In that case they may let drop her anchor and return to their ship." "That is a happy thought," the captain said; and running forward he told the crew to take the boat at once. "I have another idea, captain," Ned said, just as they were about to push off. "As we saw when we were passing the ship we are drifting stern foremost. If we can fasten a long line to her stern we can hang on to it. They will not be able to see us if we are twenty fathoms astern. Then, if they anchor, and, as is likely enough, leave two or three men on board, we can haul ourselves noiselessly up with the rope and board her." "Capital!" the captain replied. "I was wondering how we should find her again in the dark. That would be the very thing." He sprang on board again, fastened a light line to the rudder, and dropped down into the boat again. "Now, back her astern, lads, very gently. I can hear their oars."