But he forced Maget to go on. Without Juan, the peon, to leave them caches of food on the trail, they would have a difficult time getting provender, but both were trained jungle travelers and could find fruit and shoot enough game to keep them going. Day after day they marched on, not far from the rear of the party before them. They took care to keep off Gurlone's heels, for they did not wish their presence to be discovered. When they had been on the journey, which led them east, for four days, the two rascals came to a waterless plateau, which stretched before them in dry perspective. Before they came to the end of this, they knew what real thirst was, and their tongues were black in their mouths before they caught the curling smoke of fires in the valley where they knew the mine must be. "That's the mine," gasped Durkin, pointing to the smoke. * * * * * The sun was setting in golden splendor at their backs; they crept forward, using great boulders and piles of reddish earth, strange to them, for cover. Finally they reached the trail which led to the hills overlooking the valley, and a panorama spread before them which amazed them because of its elaborateness. It seemed more like a stage scene than a wilderness picture. Straight ahead of them, as they lay flat on their stomachs and peered at the big camp, yawned the black mouth of a large cavern. This, they were sure, was the mine itself. Close by this mouth stood a stone hut. It was clear that this building had something to do with the ore, perhaps a refining plant, Durkin suggested. There were long barracks for the peons, inside a barbed wire enclosure, and they could see the little men lounging now about campfires, where frying food was being prepared. Also, there was a long, low building with many windows in it, and houses for supplies and for the use of the owners of the camp. "Looks like they were ready in case of a fight," said Durkin at last. "That fence around the peons looks like they might be havin' trouble." "Some camp," breathed Maget. "We got to find somethin' to drink," said Durkin. "Come on." They worked their way about the rim of the valley, and in doing so caught glimpses of Professor Gurlone, the elderly man they had spotted in Manaos, and also saw the big Portuguese with his sightless eyes. At the other side of the valley, they came on a spring which flowed to the east and disappeared under ground farther down. "Funny water, ain't it?" said Durkin, lying down on his stomach to suck up the milky water. But they were not in any mood to be particular about the fluids they drank. The long dry march across the arid lands separating the camp from the rest of the world had taken all moisture from their throats. * * * * *