dull sound of the swift-waving tentacles of the horde came to him, there was a tense moment of agony of waiting, and then the tentacles of the leader flashed up in the signal!
But at the same moment Randall felt his limbs released by the four monsters that had held them! There seemed sudden wild confusion in the great cave. The strange rite broke off; the horde of worm monsters crawled frantically this way and that in it. Randall slipped off the block; staggered to his feet.
The worm monsters in the cave were swarming toward the downward tunnel openings! The two captives forgotten, the creatures were pouring in crawling, fighting swarms toward those openings. And then, as Randall and Lanier stared stupefied, there came a red flash from one of the upward tunnels and a brilliant crimson ray stabbed down and mowed a path of annihilation in the cave's earthen side!
The two heard great thumping sounds from above, saw the tunnels leading from above becoming suddenly many times greater in size as red rays flashed down along them to gouge the tunnel's walls. Then down from those enlarged tunnels there were bursting long shining shapes, great centipede-machines crawling down the tunnels which their rays made larger before them! And as the centipede-machines burst down into the cavern their crimson rays stabbed right and left to cut paths of annihilation among the worms.
"The Martians!" Lanier cried. "They didn't find us above – they knew we must have been taken by these things – and they've come down after us!"
"Back, Lanier!" Randall shouted. "Quick, before they see us, behind this – "
As he spoke he was jerking Lanier with him behind the looming earthen statue of the great worm god. Crouched there between the statue and the cave's wall they were hidden precariously from the view of those in the cavern. And now that cavern had become a scene of horror unthinkable as the centipede-machines pouring down into it blasted the frantically crawling worm monsters with their rays.
The worm monsters attempted no resistance, but sought only to escape into their downward tunnels, and in moments those not caught by the rays had vanished in the openings. But the centipede-machines, after racing swiftly around the cavity, were following them, were going down into those downward tunnels also, their rays blasting down ahead of each to make the tunnel large enough for them to follow.
In a moment all but one had vanished down into the openings, the remaining one having its front or head jammed in one of the openings from the failure of its operator to blast a large enough opening before him. As Lanier and Randall watched tensely they saw the machine's control room door open and a Martian descend. He inspected the tunnel opening in which his vehicle was jammed, then with a hand ray-tube began to disintegrate the earth around that opening to free his machine.
Randall clutched his companion's arm. "That machine!" he whispered. "If we could capture it, it would give us a chance to get back to the city – to Milton and the matter-transmitter!"
Lanier started, then nodded swiftly. "We'll chance it," he whispered. "For our twenty-four hours here must be almost up."
They hesitated a moment, then crept forward from behind the great earthen statue. The Martian had his back to them, his attention on the freeing of his mechanism. Across the dim-lit cavern they crept softly, and were within a dozen feet of the Martian when some sound made him wheel quickly to confront them with the deadly tube. But even as he whirled the two had leaped.
The force of their leap sent them flying through that dozen feet of space to strike the Martian at the moment his tube levelled. One hissing call he uttered as they struck him, and then with all his strength Lanier had grasped the crocodilian body and bent it backward. Something in it snapped, and the Martian collapsed limply. The two looked wildly around.
Nothing showed that the Martian's call had been heard, and after a moment's glance that showed the head of the centipede machine already freed, they were clambering up into its control room, closing the door. Randall seized the knob with which he had seen the machines operated. As he pulled it toward him the machine moved across the tunnel opening and raced smoothly over the cavern's floor. As he turned the knob the machine turned swiftly in the same direction.
He headed the long mechanism toward one of the upward-curving tunnels which the Martians had blasted larger in descending. They were almost to it when there flashed up into the cavity from one of the downward tunnel openings a centipede-machine, and then another, and another. The Martians in their transparent-windowed control rooms took in at a glance the dead crocodilian on the floor, and then the three great machines were darting toward that of Randall and Lanier.
"The Martian we killed!" Randall cried. "They heard his call and are coming after us!"
"Turn to the wall!" Lanier shouted to him. "I have the rays – "
At that moment there was a clicking beside Randall and he glimpsed Lanier pulling forth two small grips he had found, then saw that two crimson rays were stabbing from tubes in their machine's front toward the others even as their own rays darted back. The beams that had been loosed toward them grazed past them as Randall whirled their machine to the wall, and he saw one of the three attacking mechanisms vanish as Lanier's beams struck it.
Around – back – with instinctive, lightninglike motions he whirled their centipede-machine in the great dim-lit cave as the two remaining ones leapt again to the attack. Their rays shot right and left to catch the two men's vehicle in a trap of death, and as Randall swung their own mechanism straight ahead he glimpsed at the cavern's far end the great earthen worm god still upreared.
On either side of them the red beams burned as they leapt forward, but as though running a gauntlet of death Randall kept the machine racing forward in the succeeding second until the two others loomed on either side of it. Then Lanier's beams were driving in turn to right and left of them and the two vanished as though by magic as they were struck.
"Up to the surface!" Lanier cried, his eyes on the glowing dial of his wrist-watch. "We've been held hours here – we've but a half-hour or more before earth midnight!"
Randall sent their machine racing again toward one of the upward tunnels, and as the long mechanism began to climb smoothly up the darkness he heard Lanier agonizing beside him.
"God, if we have only enough time to get to that matter-transmitter before the Martians start flashing to earth through it!"
"But Milton?" Randall cried. "We don't know whether he's alive or dead! We can't leave him!"
"We must!" said Lanier solemnly. "Our duty's to the earth now, man, to the world that we alone can save from the Martian invasion and conquest! At the hour of twelve Nelson will have the matter-receiver turned on and at that hour the Martian will start flashing to earth – unless we prevent!"
Suddenly Randall grasped the knob in his hands more tightly as light showed above them. They had been climbing upward through the enlarged tunnel at their machine's highest speed, and now as the tunnel curved the light grew stronger. Suddenly they were emerging into the thin sunlight of the Martian day.
In the crimson jungle about them were many Martians, milling excitedly to and fro, and other centipede-machines that were blasting their way down through tunnels to the worm world beneath.
Randall and Lanier, breathless, crouched low in the transparent-windowed control room as they sent their mechanism racing through this scene of swarming activity. Both gasped as one of the centipede-machines clashed against their own in passing, its Martian driver turning to stare after them. But there came no alarm, and in a moment they had passed out of the swarm of Martians and machines and were heading through the jungle in the direction of the city.
Through the weird red vegetation their mechanism raced with them,
