"You loud-mouths have been very successful in attracting the attention of those animated pile-drivers," she whispered with the very faintest of breaths. "If you will keep your lips zipped for the next little while maybe the robot that's staring at us over the rim of the pit will think we're turbo-generators or something and go away. Maybe!"
Josey swivelled his head up and gasped. "It's there—it's coming down!" he cried. "Let's leave here!"
The three backed away toward the tube, slowly, watching the efforts of the machine-thing to descend the precipitous wall. It was having difficulties, and the three were beginning to feel a bit better, when —
Annamarie, turning her head to watch where she was going, saw and heard the cavalcade that was bearing down on them at the same time and screamed shrilly. "Good Lord - the cavalry!" she yelled. "Get out your guns!"
A string of a dozen huge, spider-shaped robots of a totally new design were charging down at them, running swiftly along the sides of the rings of the Tube, through the tunnel. They carried no weapons, but the three soon saw why—from the ugly snouts of the egg-shaped bodies of the creatures protruded a black cone. A blinding flash came from the cone of the first of the new arrivals; the aim was bad, for overhead a section of the cement roof flared ghastly white and commenced to drop.
Annamarie had her useless paralyzer out and firing before she realized its uselessness against metal beings with no nervous system to paralyze. She hurled it at the nearest of the new robots in a highly futile gesture of rage.
But the two men had their more potent weapons out and firing, and were taking a toll of the spider-like monstrosities. Three or four of them were down, partially blocking the path of the oncoming others; another was missing all its metal legs along one side of its body, and two of the remainder showed evidence of the accuracy of the Earthmen's fire.
But the odds were still extreme, and the built-in blasters of the robots were coming uncomfortably close.
Stanton saw that, and shifted his tactics. Holstering his heavy blaster, he grabbed Annamarie and shoved her into the Mars-Tube, crying to Josey to follow. Josey came slowly after them, turning to fire again and again at the robots, but with little effect. A quick look at the charge-dial on the butt of his heat-gun showed why; the power was almost exhausted.
He shouted as much to Stanton. "I figured that would be happening—now we run!" Stanton cried back, and the three sped along the Mars-Tube, leaping the hoops as they came to them.
"What a time for a hurdle race!" gasped Annamarie, bounding over the rings, which were raised about a foot from the ground. "You'd think we would have known better than to investigate things that're supposed to be private."
"Save your breath for running," panted Josey. "Are they following us in here?"
Stanton swivelled his head to look, and a startled cry escaped him. "They're following us—but look!"
The other two slowed, then stopped running altogether and stared in wonder. One of the robots had charged into the Mars-Tube—and had been levitated! He was swinging gently in the air, the long metal legs squirming fiercely, but not touching anything."
"How —?"
"They're metal!" Annamarie cried. "Don't you see—they're metal, and the hoops are charged. They must have some of the same metal as the Tube cars are made of in their construction—the force of the hoops acts on them, too!"
That seemed to be the explanation. "Then we're safe!" gasped Josey, staggering about, looking for a place to sit.
"Not by a long shot! Get moving again!" And Stanton set the example.
"You mean because they can still shoot at us?" Josey cried, following Stanton's dog-trot nonetheless. "But they can't aim the guns—they seem to be built in, only capable of shooting directly forward."
"Very true," gritted Stanton. "But have you forgotten that this subway is in use? According to my calculations, there should be another car along in about thirty seconds or less –and please notice, there isn't any by-path anymore. It stopped back a couple of hundred feet. If we get caught here by a car, we get mashed. So – unless you want to go back and sign an armistice with the robots? I thought not – so we better keep going. Fast!"
The three were lucky – very lucky. For just when it seemed certain that they would have to run on and on until the bullet-fast car overtook them, or go back and face the potent weapons of the guard robots, a narrow crevice appeared in the side of the tunnel-wall. The three bolted into it and slumped to the ground.
CRASH!
"What was that?" cried Annamarie.
"That," said Josey slowly, "was what happens to a robot when the fast express comes by. Just thank God it wasn't us."
Stanton poked his head gingerly into the Mars-Tube and stared down. "Say," he muttered wonderingly, "when we wreck something we do it good. We've ripped out a whole section of the hoops – by proxy, of course. When the car hit the robot they were both smashed to atoms, and the pieces knocked out half a dozen of the suspension rings. I would say, offhand, that this line has run its last train."
"Where do you suppose this crevice leads?" asked Annamarie, forgetting the damage that couldn't be undone.
"I don't know. The station ought to be around here somewhere – we were running toward it. Maybe this will lead us into the station if we follow it. If it doesn't, maybe we can drill a tunnel from here to the station with my blaster."
Drilling wasn't necessary. A few feet in, the scarcely passable crevice widened into a broad fissure, through which a faint light was visible. Exploration revealed that the faint light came from a wall-chart showing the positions and destinations of the trains. The chart was displaying the symbol of a Zeta train – the train that would never arrive.
"Very practical people, we are," Annamarie remarked with irony. "We didn't think to bring lights."
"We never needed them anywhere else on the planet – we can't be blamed too much. Anyway, the code-panel gives us a little light."
By the steady, dim red glow cast by the code-panel, the three could see the anteroom fairly clearly. It was disappointing. For all they could tell, there was no difference between this and any other station on the whole planet. But why all the secrecy? The dead Martians surely had a reason for leaving the guard-robots so thick and furious. But what was it?
Stanton pressed an ear to the wall of the anteroom. "Listen!" he snapped. "Do you hear —?"
"Yes," said the girl at length. "Scuffling noises – a sort of gurgling too, like running water passing through pipes." "Look there!" wailed Josey.
"Where?" asked the archaeologist naturally. The dark was impenetrable. Or was it? There was a faint glimmer of light, not a reflection from the code-panel, that shone through a continuation of the fissure. It came, not from a single source of light, but from several, eight or ten at least. The lights were bobbing up and down. "I'd swear they were walking!" marvelled Ray.
"Ray," shrieked the girl faintly. As the lights grew nearer, she could see what they were – pulsing domes of a purplish glow that ebbed and flowed in tides of dull light. The light seemed to shine from behind a sort of membrane, and the outer surfaces of the membrane were marked off with faces –terrible, savage faces, with carnivorous teeth projecting from mouths that were like ragged slashes edged in writhing red.
"Ray!" Annamarie cried again. "Those lights – they're the luminous heads of living creatures!"
"God help us – you're right!" Stanton whispered. The patterns of what he had read in the bobbin-books began to form a whole in his mind. It all blended in – "Under-Eaters," "Fiends from Below," "Raging Glows." Those weirdly cryptic creatures that were now approaching. And – "Good Lord!" Stanton ejaculated, feeling squeamishly sick. "Look at them – they look like human beings!"