Tharol Sen can show you around, and when the time is right, she will take you to the transmitter. It is securely hidden where the police will not find it. In the meantime—" "I'm a prisoner?" Sen Bas giggled. "Not exactly. Say, my guest. Your only jailers are outside. Let us hope they will stay there until you can go to Roper ... as he requested." "Roper must have been in a hurry to get away," grated Torry. "He was. For excellent reasons. A Solar Survey ship is due off Triton at any time. Roper wanted to be in sole possession of the satellite, with samples to make good his claims to minerals." Suddenly, everything happened at once. Shrill alarms blared from a dozen quarters. Red lights flared ominously. A fusillade of shots broke out. Sen Bas swore luridly in Martian. "The police!" Heavy explosions thundered overhead. The ceiling cracked, opened wide. An avalanche of steel and stone and breaking glass roared into the subcellar gardens. Dust clouds blinded Torry. IV From the collapsing roof tons of debris poured into the underground gardens and spread over the floor like advancing mountains. Dust choked, Torry staggered blindly before it in panic to avoid being caught and buried. It was like a swift, deadly race with an engulfing landslide. Free of the confusion and deafening tumult, he turned to look about for Sen Bas and the girl. In the dust cloud it was impossible to see anything. Masses of masonry and fused glass from the collapsing cavern roof continued to detach themselves and crash down in random uproar. Cautiously, Torry picked his way over the mounds of rubble, searching. A feeble cry led him to Sen Bas. The aged Martian looked like a tattered bundle of red rags. Half buried under a hillock of shattered stone and twisted steel, the old man showed little sign of life, save for still-glittering eyes and husks of sound emerging from bloodless lips. Spreading stains of red seeped from beneath the prisoning blocks. "If I can lift the stones, can you drag yourself out?" asked Torry. "Don't—think—so!" gasped Sen Bas. "Where can I find help?" "Don't try. Go—quickly. Save