The rattling of the pebble was succeeded by a long interval of silence, and the lad understood that too. The warriors, to whom time was nothing, fearing that suspicion had been aroused by the fall of the pebble, would wait until it had been lulled before resuming their advance. They would flatten themselves like lizards against the slope, not stirring an inch. But the three were as patient as they, and while a full hour passed after the slip of the stone before the slightest sound came from the slope, they did not relax their vigilance a particle. Then all three heard a slight rustle among the bushes and they peered cautiously over. They were able to discern the dim outline of figures among the bushes about twenty feet below, and Wilier, who directed the defense, whispered that Tayoga and he would take aim, while Robert held his fire in reserve. Then the Onondaga and he picked their targets in the darkness and pulled trigger. Shouts, the fall of bodies and the crackling of rifles came back. A half dozen bullets, fired almost at random, whistled over their heads and then Robert sent his own lead at a shadow which appeared very clearly among the bushes, a crashing fall following at once. Then the three, not waiting to reload, snatched out their pistols and held themselves ready for a further attack, if it should come. But it did not come. Even the rage of Tandakora had had enough. His second repulse had been bloodier than the first, and it had been proved with the lives of his warriors that they could not storm that terrible steep, in the face of three such redoubtable marksmen. Robert heard a number of pebbles rolling now, but they were made by men descending, and the three, certain of abundant leisure, reloaded their rifles. Their eyes told them nothing, but they were as sure as if they had seen them that the warriors had disappeared in the sea of darkness with which the gulf was filled. The lad breathed a long sigh of relief. "You're justified in your satisfaction," said Willet. "I think it's the last direct attack they'll make upon us. Now they'll try the slow methods of siege and our exhaustion by thirst, and how it would make their venom rise if they knew anything about that glorious fountain of ours! Since it's to be a test of patience, we'd better make things easy for ourselves. I'll sit here and watch the slope, and, as the night is turning cold, you and Tayoga, Robert, can build a fire." There was a dip in the center of the crest, and in this they heaped the fallen wood, which here as elsewhere in the wilderness was abundant. Wood and water, two great requisites of primitive man, they had in plenty, and had it not been for their eagerness to go forward with their work they would have been content to stay indefinitely on the peak.