"You never intended that we should see daylight again," Rick stated. He winked at his friends. "Suppose we tie a few stalactites to your feet, and Ko's, and see how long it takes for you to get down to where the heavy water is?" He looked meaningly at the lake. Ko groaned, but Long Shadow only smiled. "If that's the way you want it," he said, "it will at least be quick. Both of us are done for, whether you know it or not. Your Mr. Bradley will see to that." * * * * * As Long Shadow had said, it was little more than ten minutes after crossing the lake before the party reached the cave under the Black Buddha. They had passed through the cave where Rick had found the Tibetan. Again he realized how lucky he had been. Some good angel had led him to the main route. Had he fallen asleep in some other cave, he might still be wandering through the labyrinth. The rifles taken from Scotty and Zircon by Long Shadow's men had been found in one of the tents. With Rick's rifle, they were insurance against treachery. But Long Shadow seemed resigned, for some reason Rick couldn't fathom, and Ko did nothing but curse the bearers who carried him. Before reaching the great cave they stopped at a blank wall. At a signal from Long Shadow, one of the Tibetans reached behind a stalagmite and pulled a lever. A section of the wall swung open, disclosing the passage they had thought stopped in a dead end. In a few moments they were crossing the outer cave, and Rick saw at once that the bars across the entrance passage were gone. "When the inner door opens from the inside, the bars also open," Long Shadow said. "There is another cave under this one where the mechanism is located. No, I am not responsible. The ancient ones who made the Black Buddha also made the doors and the mechanism." Rick ran ahead through the passage. He found the leather thong that controlled the door and pulled. The metal tongue came out of its slot permitting the counterbalance to swing the trap door upward. The others were behind him with their lights, and Rick saw his shadow loom large on the wall behind the Black Buddha. In the same way, the Long Shadow had been projected upward, probably by the light from a candle in the hands of a Tibetan bearer. He experimented, backing down a few steps. His shadow seemed to fold downward into the oblong box of light cast by the flashlights. When he walked up the stairs again, the shadow grew out of the bottom of the projected oblong of light. As Rick reached floor level, he froze suddenly, his finger slipping the hammer of his rifle to full cock. There were lights in the cave! As he turned to call a warning, yellow-robed lamas, who had seen the reflected light on the rear wall, poured around the statue with wild yells, their torches held high. "Something's up," Rick called to the others. "Watch it!"