Raf would gladly have run, but he could not move faster than his guides, and while their pace seemed deliberate, they did not pause to rest. The whole city, he decided, must be honeycombed with these drains. After traversing a fourth tunnel, they climbed out of the flood onto a dry passage, which wormed along, almost turning on itself at times.
Side passages ran out from this corridor like rootlets from a parent root, and small parties of mermen broke from the regiment to follow certain ones, leaving without orders or farewells. At the fifth of these Dalgard touched Raf's arm and drew him aside.
"This is our way." Tensely the scout waited. If the stranger refused, then the one plan the scout had formed during the past half-hour would fail. He still held to the hope that Raf, with what Raf carried, could succeed in the only project which would mean, perhaps not his safety nor the safety of the tribe he now marched among, but the eventual safety of Astra itself, the safety of all the harmless people of the sea, the little creatures of the grass and the sky, of his own land at Homeport. He would have to force Raf into action if need be. He did not use the mind touch; he knew now the unspoken resentment which followed that. If it became necessary—Dalgard's hands balled into fists—he would strike down the stranger—take from him—Swiftly he turned his thoughts from that. It might be easy, now that he had established mental contact with this off-worlder, for the other to pick up a thought as vivid as that.
But luckily Raf obediently turned into the side passage with the six mermen who were to attack at this particular point. The way grew narrower until they crept on hands and knees between rough walls which were not of the same construction as the larger tunnels. The smaller mermen had no difficulty in getting through, but twice Raf's equipment belt caught on projections and he had to fight his way free.
They crawled one by one into a ventilation shaft much like the one he had climbed at the Center. Dalgard's whisper reached him.
"We are now in the building which houses their sky ship."
"I know that one," Raf returned almost eagerly, glad at last to be back so close to familiar territory. He climbed up the hand-and footholds the sea-monster lamp disclosed, wishing the mermen ahead would speed up.
The grille at the head of the shaft had been removed, and the invaders arose one by one into a dim and dusty place of motionless machinery, which, by all tangible evidence, had not been entered for some time. But the cautious manner in which the sea people strung out to approach the far door argued that the same might not be true beyond.
For the first time Raf noticed that his human companion now held one of the knives of the merpeople, and he drew his stun gun. But he could not forget the flame-throwers which might at that very moment be trained upon the other side of that door by the aliens. They might be walking into a trap.
He half expected one of those disconcerting thought answers from Dalgard. But the scout was playing safe—nothing must upset the stranger. Confronted by what had to be done, he might be influenced into acting for them. So Dalgard strode softly ahead, apparently not interested in Raf.
One of the mermen worked at the door, using the point of his spear as a lever. Here again was a vista of machinery. But these machines were alive; a faint hum came from their casings. The mermen scattered, taking cover, a move copied by the two humans.
The pilot remained in hiding, but he saw one of the furred people running on as light-footedly as a shadow. Then his arm drew back, and he cast his spear. Raf fancied he could hear a faint whistle as the weapon cut the air. There was a cry, and the merman ran on, vanishing into the shadows, to return a second or two later wiping stains from his weapon. Out of their places of concealment, his fellows gathered about him. And the humans followed.
Now they were fronted by a ramp leading up, and the mermen took it quickly, their bare, scaled feet setting up a whispering echo which was drowned by the clop of Raf's boots. Once more the party was alert, ready for trouble, and taking his cue from them, he kept his stun gun in his hand.
But the maneuver at the head of the ramp surprised him. For, though he had heard no signal, all the party but one plastered their bodies back against the wall, Dalgard pulling Raf into position beside him, the scout's muscular bare arm pinning the pilot into a narrow space. One merman stood at the crack of the door at the top of the ramp. He pushed the barrier open and crept in.
Meanwhile those who waited poised their spears, all aimed at that door. Raf fingered the button on his gun to "spray" as he had when he had faced the attack of the scavengers in the arena tunnels.
There was a cry, a shout with a summons in it. And the venturesome merman thudded back through the door. But he was not alone. Two of the black guardsmen, their flamers spitting fiery death, ran behind him, and the curling lash of one of those flames almost wreathed the runner before he swung aside. Raf fired without consciously aiming. Both of the sentries fell forward, to slide limply down the ramp.
Then Dalgard pulled him on. "The way is open," he said. "This is it!" There was an excited exultation in his voice.
17
DESTRUCTION UNLEASHED
The space they now entered must be the core of the building, Raf thought a little dazedly. For there, towering over them was the round bulb of the globe. And about its open hatch were piles of the material which he had last seen in the warehouse on the other continent. The unloading of the alien ship had been hastily interrupted.
Since neither the merman nor Dalgard took cover, Raf judged that they did not fear attack now. But when he turned his attention away from the ship, he found not only the colony scout but most of the sea people gathered about him as if waiting for some action on his part.
"What is it?" He could feel it, that strong pressure, that band united, in willing him into some move. His stubborn streak of independence made his reaction contrary. He was not going to be pushed into anything.
"In this hour," Dalgard spoke aloud, avoiding the mind touch which might stiffen Raf's rebellion. He wished that some older, wiser Elder from Homeport were there. So little time—Yet this stranger with practically no effort might accomplish all they had come to do, if he could only be persuaded into action. "In this hour, here is the heart of what civilization remains to Those Others. Destroy it, and it will not matter whether they kill us. For in the days to come they will have nothing left."
Raf understood. This was why he had been brought here. They wanted him to use the blast bombs. And one part of him was calculating the best places to set his two remaining bombs for the wildest possible destruction. That part of him could accept the logic of Dalgard's reasoning. He doubted if the aliens could repair the globe if it were damaged, and he was sure that much which they had brought back from the eastern continent was irreplaceable. The bombs had not been intended for such a use. They were defensive, anti-personal weapons to be employed as he had done against the lizard in the arena. But placed properly—Without thinking his hands went to the sealed pocket in the breast of his tunic.
Dalgard saw that gesture and inside him some taut cord began to unwind. Then the stranger's hands dropped, and he swung around to face the colony scout squarely, a scowl twisting his black brows almost together.
"This isn't my fight," he stated flatly. "I've got to get back to the flitter, to my spacer—"
What was the matter? Dalgard tried to understand. If the aliens won now, this stranger was in as great a danger as were the rest of them. Did he believe that Those Others would allow any colony to be established on a world they ruled?
"There will be no future for you here," he spoke slowly, trying with all his power to get through to the other. "They will not allow you to found another Homeport. You will have no colony—"