A good half of the attacking creatures were included in the dead bodies. The other half, Blake now saw, had retreated to cluster in wild panic about the remaining blob of jelly. Realizing exultantly that his single shot had slain one of the two weirdly disassociated organisms, Blake with pistol in hand advanced toward the other, trying to get a clear shot at the jelly through the furry bodies clustering around it. * * * * * The group promptly turned and fled in blind panic. Blake sent the pistol's last shot crashing into the mass without any appreciable effect. Then the things' stampede carried them hurtling on through one of the gold-flecked side walls out into the swirling purple mists. The gold-flecked sheet flowed together again so swiftly behind the things that a fraction of a second later there was not even the slightest indication in its shimmering unbroken surface to show that it had ever been pierced. For thirty yards the fleeing ape-things sped on into the purple vapors. Then disaster struck them with bewildering swiftness. They stopped in full flight, shuddered for a moment, then slumped to the ground with their limbs writhing in agony. In their center the jelly ovoid quivered madly in the same strange torture. Tiny patches of vivid purple appeared at a hundred different points upon the dying creatures. The patches spread and merged with lightning rapidity until a solid sheet of livid purple covered the writhing mass. Swiftly that mass lost both movement and shape as it melted down into a pool of turgid purple slime. Then the slime vaporized into purple mists that blended into the surrounding vapors, and all trace of the ape-things and their jelly nucleus had vanished. Stunned by the incredible speed of this general dissolution, Blake realized for the first time the real reason for the presence of the gold-flecked walls of force. Without those shimmering walls the captives would not have lived for a minute in the deadly purple atmosphere of this weird world beneath the twin suns. The gold-flecked walls were both their protection and their prison. The swirling purple mists outside those walls held the Earthlings as effectively and hopelessly prisoners in their enclosure as gold-fish in a bowl of water. * * * * * Blake turned back to the thicket to see how Helen and Mapes had fared in that terrific battle with the headless things. He was relieved to see that the girl had apparently escaped without even a scratch. She was kneeling beside Mapes' prone figure, doing what she could to revive him. The gangster was badly battered, but he seemed to have no serious injuries. He was already beginning to stir weakly and show signs of returning life.