Evan clambered to the roof of the servants' quarters, and Arthur passed up his rifle. Evan stood erect and raised the weapon. Then he stopped. From the ground, we saw him looking blankly at the roof of the house. From where he stood, he could see it clearly. His expression was at once amazed and apprehensive. The beast had not left the house, or we would have seen it. It had not crossed the clearing. It had not entered the house, because the dogs were unalarmed. It had not in any discoverable fashion escaped from its position astride the ridge pole, but Evan told us and we immediately verified the fact that it was no longer on the roof. It had not escaped to the jungle. It had not secreted itself in the house; yet the monstrous ape had vanished! CHAPTER VI. THE FORM THAT CREPT. Again we searched the house from top to bottom. Again we led the dogs into every nook and cranny. Again they sniffed anxiously in the storeroom, but gave up the quest after a moment or so. In our search of the greater part of the house the dogs had seemed more bored than anything else. We had led them to the dog that had been killed, before attempting to enter the house, and they smelled at his neck cautiously and drew back with low growls. If the gorilla had been in the house, they would surely have scented him and warned us. The only time they gave any indication at all of interest, far less of excitement, was when they sniffed at the storeroom door. Once inside, they moved about aimlessly. We debated our next move. The gorilla simply could not be in the house. With his ferocity, he would surely have made a move to attack one or another of us during our searchings. At last Arthur found a sign that reassured us as to his absence without lessening in the least the mystery of his means of escape. Something had led him to scout around the edge of the clearing surrounding the house. He straightened up with a shout. "Look here!" We ran to him and looked where he pointed. There, on the earth, just beneath the overhanging limb of the first of the jungle trees, were the prints of strangely handlike toes. "Here's where he jumped for the lowest limb there," said Evan excitedly. "See?" Directly above us a heavy limb spread out from the trunk of the tree. Evidently the gorilla had leaped from that spot. How he had run across the moonlit lawn under our very eyes remained inexplicable. Thinking back, however, I remembered that once or twice wisps of infrequent cloud had temporarily obscured the moon. Could he have seized one of those moments of darkness? It seemed impossible, but there was no other explanation that could be made. Somewhat reassured, we entered the house again. One of us stayed out on the veranda, however, and watched to make sure the beast would attempt no daring daylight rush on our stronghold. We planned to tether several of the dogs that night to the piles which raised the house from the ground.