But they were as vigilant as the ones who had made the discovery of the flight, and a whoop that came from some point ahead warned the Mohawk that the passage was not to be as uneventful as he expected. The worst of it was, the reply heard by all in the canoe came from immediately in front, so that they had only to keep on in the direction in which they were going to run straight into ambush. At this time the fugitives were near the middle of the Susquehanna, the night being so dark that they were invisible to any upon either shore, and they were hardly liable to discovery unless some of their enemies should start out upon the river in quest of them. It was obviously the duty of the Mohawk to hold that position, and move up or down stream, as might seem best. The whites supposed he would continue down the current, but, to their surprise, he headed straight against it, and sped upward with astonishing speed. CHAPTER XVII. AT LAST! Up to that time the fugitives, although steadily drifting down stream, seemed to keep directly in the way of the parties whom they were seeking to avoid; for, no matter where they headed, or at what point they aimed, they were sure to find some of the Iroquois waiting to receive them. It looked, indeed, as if the redmen were shrewd enough to make allowance for this fact, judging from the way the attempt turned out in each instance. It was the purpose of Lena-Wingo, in heading up stream, to break through this chain that seemed thrown around them, and there appeared no other way of doing it. Neither to the right nor left turned he, but swinging his paddle powerfully and noiselessly, he drove the deeply-laden canoe against the current with a force that sent the water foaming from the prow, the soft wash and rustle of the current being the only noise that marked this bird-like flight. Going at such a rate, he did not need much time to pass over considerable space, and he was still forging ahead in the same swift fashion when he caught the sound of another paddle. This, then, was proof that the pursuers did not care to wait till the fugitives should land, but had sent some of their warriors out to search for them. Lena-Wingo recognized the sound as coming from the shore which he meant to reach, but at some distance below them, which fact was proof of his wisdom in taking the course he did. He kept up his flight without the least cessation, and had every reason to hope that the Iroquois were outwitted, when he was more angered than alarmed by hearing the sweep of still another paddle--this time coming from a point above where he was, but on the same side of the river as the former. The Iroquois were making the hunt hotter than he anticipated. The Mohawk stopped paddling and looked around in the gloom that shut down on every hand, for there was cause to expect the appearance of other boats, and it was necessary to watch where his own craft was going.