Istafiev was speaking again, in low, terse tones, oblivious of the desperate resolve forming in Chris"s brain.
"Only one of the dirigibles had been destroyed. Well, it iss too bad, but not fatal to the plan. The ZX-1 can hamper our country"s operations when she strikes, but if the ZX-2 were also in action, they would be hampered much more--perhaps fatally. It iss not serious. So we go ahead. Now, Kashtanov, for the last time, the scheme of wrecking Gatun Spillway iss this: "Note, here, the small golf course. That iss your landing s.p.a.ce. You know its location: a mile, perhaps, from Gatun Dam and the spillway. At night, there iss no one near it or on it. You drop down to the golf course from seven thousand feet: the helicopter motors are m.u.f.fled, and no one will hear you come. Some of the stretches of the course are secluded and hidden by the surrounding jungle; choose one of these to land on. Well, that iss easy.
"The spillway iss about midway in Gatun Dam: its channel has been cut through a hill. You come along the side of this channel right up close to the spillway--close, remember!--and leave the box there. The range of the rays, you know, iss two hundred feet: set them to fire one minute after you leave the box. They will destroy the seven gates of the spillway and also part of the dam and the hydro-electric station. Gatun Lake will then empty itself; the ca.n.a.l will be half drained; the power will be gone--it will take half a year to repair it all. The ZX-1 can fly up to the east coast, thanks to Zenalishin"s fumbling--yess; but these American fleets are ma.s.sed in the Pacific; they will have to go around South America to reach the Atlantic--and that will take weeks.
"And in that time the Soviet has crossed the Atlantic uncontested and has paralyzed the heart of America, her eastern states. Ah, it iss magnificent!"
But Kashtanov"s thoughts were elsewhere. Peering hard at the chart, he said: "I have a minute to get clear, eh? Well, I can do that; but won"t the water sweeping through from Gatun Lake after the spillway is wrecked catch me?"
"No. You run up the hill the spillway channel is cut through; it iss high ground, and the golf course iss on high ground. No one will see you coming or going, naturally, and the box iss not big enough to be noticed at night. The noise of its equalizers will be covered by the water coming through the spillway. It iss--what they say?--fool-proof. You cannot fail, Kashtanov. And--" he broke into swift-flowing, liquid Russian, his swarthy face lighting up, his arms waving, one of them slapping the other"s back.
"Stop the dramatics," said Kashtanov, "and speak in English. I"ve worked so long in America, Russian is hard to understand. Time to begin?"
Istafiev glanced at a watch on his wrist. "A few minutes. Look you." He went to a side locker in the room, opened it, hauled out with both hands a box of plain dull metal, and put it on the table. It was larger than the one Chris Travers had seen on the ZX-1, but otherwise similar.
"A double charge of nitro-lanarline iss in this," murmured Istafiev complacently. "Imagine it, when released! You know the working well, do you not? Yess. Well, I put it in the plane, ready." He stepped to the hut"s single door and pa.s.sed out. Through it Chris could see the tiny clearing, dark under the camouflaged framework, now closed once more; the light from the hut showed him the wings of the helicopter-plane standing there. He heard, moreover, the sound of a shovel from somewhere, and knew that a lonely grave was being dug in the wilderness. Then Istafiev shouted: "Grigory! That grave, make it wide, make room for two." He came back and peered sidewise at Chris. "Not conscious yet?" A foot thudded into the American"s side. "No. Well, I see to him when you are gone, Kashtanov. Yess, thick darkness iss here. Time to begin. Take off your clothes."
Chris was now keenly alert, poised, ready for any chance that might come. The odds were two or three to one, and a gun into the bargain, but the stakes were higher than any ever played for before; and a stroke had to be made, no matter how seemingly hopeless. Through his lashes he watched, turned things over in his mind--and something leaped within him when he saw Kashtanov unbuckle the gun around his waist and lay it down, meanwhile taking off the clothes he was wearing: and when he heard the question which followed, and Istafiev"s answer.
Naked, lean-muscled and sinewy, Kashtanov paused before the door of the cage. "How will this affect me?" he asked. "Painful?"
"You will be conscious of no sensation. You will see me, yess, and the room, but you will be paralyzed completely while the power is on."
"Paralyzed, eh?" murmured Kashtanov. "Well, let"s go," and he placed himself inside the cage.
Paralyzed, when the power was on! In effect, that left only Istafiev in the room: the man Grigory was outside, and the noise of the dynamo would drown any shouts for help. And Kashtanov"s gun was on the table....
Imperceptibly, Chris"s muscles tensed as he judged the distance to the table and reckoned out each movement after the first leap. One sweeping blow with the gun would put Istafiev safely out of action; then he could be bound and Grigory summoned and tied also at the point of the gun. If, by that time, Kashtanov was invisible inside the cage, the levers could be reversed and his body brought back to visibility and bound.
Then--a call broadcast from the hut"s radio-telephone to headquarters at the Ca.n.a.l and the fleets in the Pacific!
"It"ll work," Chris told himself. "It"s d.a.m.n well got to!"
But a certain part of the invisibility machine did not enter his plans.
The creamy liquid in the gla.s.sy dome began, as before, to swirl slowly: but apart from that its action was different. The white ma.s.s, instead of discharging the vapor-laden bubbles, became a whipping, highly agitated whirlpool as the tubes below glowed softly and ribbons of golden light snaked out and laced through the nude body of Kashtanov. The liquid above flowed rapidly in a complete circle, its center sucked hollow, exactly as a gla.s.s quarter-filled with water behaves when rotated quickly. Thus the outer surface of the dome, coated inside with the milky liquid, gleamed and scintillated as the whirl of light struck it and danced off it: and it even became dimly reflective.
In seconds Kashtanov"s figure lost definite outline and a.s.sumed a ghostly transparency that bared the internal organs and veins: and then his skeleton appeared.
Istafiev was facing the control panel. As he gathered his limbs for the decisive leap, Chris"s eyes were on his stocky back. But Istafiev was watching keenly the gleaming, gla.s.sy dome above.
He was surveying the action of the white substance and judging the time of the process by it. Then suddenly his vision centered on something that had seemed to move on the surface of the dome.
Something had moved. Chris, lying against the wall behind, had opened his eyes fully, had dragged back his legs beneath him and balanced himself for his leap. And, in distorted perspective, his actions were reflected on the dome.
Just for a second he poised--then sprang.
The speed Istafiev showed seemed foreign to the build of his body. In an instant he had whirled from the switchboard, fingers not lingering to release Kashtanov, and leaped.
They met at the table. Two hands shot out for the gun lying on it. Chris grabbed it first. But he paid for his speed. The swipe he had aimed with his left arm went wild; a fist thudded into his stomach and belted the wind from him, and he felt his gun-wrist seized and wrenched back.
Gasping for breath, dizzy, only the fighting instinct enabled him to crane a leg behind the other and throw his whole weight forward. The planks of the floor shivered under the two bodies that toppled onto them.
There was a melee on the floor, furious, savage, mad. In cold fact, it lasted merely for seconds; but Chris was grappling with a man whose strength was as desperate as his own, and who had not been weakened by a solar plexus blow or a cramping wait of hours in one position: the American had pa.s.sed through an eternity of physical and mental agony when Istafiev, hunching up, strained the finger of his right hand upward, searching for the gun trigger.
One stubby finger found it. Istafiev grunted. The gun trembled from the force of the hands disputing its direction; then its ugly snout, stuck out parallel to the floor, and began to creep slowly downwards as Istafiev bore on it with all his might.
"So!" he hissed. "It was clever, your little game, but it iss finished!"
But Chris, undermost, had braced his elbow on the floor. The gun held. Every ounce of his strength went into holding that one position, into keeping the weapon"s muzzle away; he was therefore not prepared for Istafiev"s sudden strategy.
There was a quick pull, a tug. Istafiev had wrenched himself over, reversing their positions and dragging Chris uppermost--and, as the American"s balance was destroyed, the gun whipped up and fired.
A bullet sang past his head. It missed by inches. But from behind came a sound as of rending cloth. The gla.s.sy dome above the cage of the machine had splintered into countless fragments.
The effect was amazing. The shafts of light from the machine"s tube ceased; creamy liquid dribbled out from the cracked dome, and, as it met the air, frothed into billows of dense gray smoke. In seconds, the room was choked with a thick, foggy vapor that obscured every object in it as well as the blackest of moonless nights.
Istafiev had not fired again, could not. With a quick, frantic wrench and twist Chris had knocked the gun from his hand, and it had slithered away, now lost in the bunching smoke. But Istafiev"s other hand, steel-ribbed with tense muscles, had darted like a snake into the American"s throat, and under that iron, relentless grip Chris was weakening. His head was whirling; the old wound throbbing waves of nausea through him. Desperately he tried to struggle loose, flailing with his legs--but useless. He knew he was slipping; slipping....
Then, out of the gray, all-hiding mist, came a voice.
"Istafiev! Where are you? Call! The machine"s broken; I"m out and invisible. Where is the American?"
Kashtanov!
Istafiev hissed: "It iss all right. He will be finished in a moment. But you--go! The box iss aboard the plane; don"t wait! You must not take chance of being hurt. Go to your work. Call Grigory in. Go, Kashtanov!"
"I go, Istafiev."
"No, you don"t!" Chris Travers croaked almost inaudibly. "You don"t!"
Thought of the Ca.n.a.l lying there defenseless, of Kashtanov speeding towards it on his wrecker"s errand, kindled within him a strength that was unnatural, superhuman. Like a wildcat he tore loose from the choking grip on his throat; Istafiev tried to subdue that sudden, unlooked-for surge of power, but could not. Five piston-like, jabbing blows crunched into him from Chris"s hurtling fist, and with the fifth Istafiev faded quietly out of the picture....
Chris sprang up and started a leap for the door he could not see. A body brushed against him; dimly through the smoke he saw the man called Grigory, and Grigory saw him, but not for long. A whaling swing lifted him two inches clear of the floor, and then he went down onto the peacefully rec.u.mbent Istafiev; and Chris Travers, fighting mad, stormed from the hut into the clearing outside.
The camouflaged framework had been raised; soft motors were purring helicopter propellers around and lifting a plane up towards the stars hanging high above.
The airplane was already feet off the ground and sweeping straight up. A sane man wouldn"t have thought of it, but Chris wasn"t quite sane just then. With a short sprint, he launched himself into a flying leap, grabbed out desperately--and felt the bar of the undercarriage between his hands.
The plane jolted. Then it steadied; rose with terrific acceleration. And Chris hauled himself up onto the undercarriage and clung to one of the wheel-stanchions, breathing, hard, hidden by the fuselage from the invisible pilot.
The clearing and the hut, with smoke billowing from it, dropped into nothingness. The night enclosed the helicopter-plane.
From the air, Panama Ca.n.a.l at night is a necklace of lights strung across the thin neck of land that separates sea from sea. Then, as a high-flying plane drops lower, the beams of light loosen into widely separated patches, which are the locks; between them the silky black ribbon of water runs, now widening into a dim, hill-girt lake, now narrowing as it pa.s.ses through ma.s.sive Culebra Cut, then widening again as it comes to the artificial Gatun Lake, at the far end of which stands Gatun Dam and its spillway.
Silence hung close over the Ca.n.a.l. The last ship had pa.s.sed through; the planes that daily maneuver over it had returned to their hangars; the men who shepherd ships through the locks had gone either to bed or to Panama City or Colon. The Ca.n.a.l, as always at night, seemed almost deserted.
To Chris, clutching tight to his hazardous perch, it looked utterly deserted. The ride had been nightmare-like, fraught every second with peril. Several times the whip of wind had come near tearing him loose; the cold air of the upper layers had numbed his fingers, his whole body; he was chilled and, experiencing the inevitable let-down which comes after a great effort, miserable. Just then, the task ahead appeared well-nigh impossible.
The only thing in his favor was that Kashtanov apparently did not know he was aboard, since the plane had flown evenly, steadily, not trying to shake off the man hanging to its landing gear by somersaulting in the sky. Evidently the jolt as it was rising hadn"t warned the unseen pilot; the fog from the broken machine had obscured Chris"s wild leap.
But what, he thought, of that? The element of surprise was in his favor--but how to gain advantage by it? He had no weapon, nothing save bare hands with which to subdue a foe as elusive as the wind that was now hurtling by him. Clinging there, slipping now and again, drenched with cold, the odds looked hopeless.
Then, suddenly, the booming of the main motor stopped. Only a quiet purring from the wings took its place. The helicopter-plane hovered almost motionless, quiet and deadly like a sinister bird of prey. It began to drop straight down through the dark. Chris Travers glanced below.
There, misty, fainty, small as the toy of a child, lay Gatun Dam, with the spillway in its center.
Chris stared. So small the dam looked--this dream of an engineer, this tiny outpost of man"s genius thrust boldly into the breast of the tropics, holding back a whole lake with its cement flanks, enabling ocean to be linked to ocean! It was the heart of the Ca.n.a.l; if burst, the veins would be drained.
Something that cannot be caught in words seemed seize the lone American then. As in a trance, he saw more than the dam; he saw what it symbolized. He saw the Frenchmen who had tried to thrust the Ca.n.a.l through first, and who had failed, dying in hundreds. He saw the men of his own race who had carried that mighty work on; saw them gouging through the raw earth and moving mountains, tiny figures doing the work of giants; saw them stricken down by fever and disease, saw others fill the empty files and go on, never wavering. He saw them complete it and seal the waters in captivity with the dam that lay below....
And with that vision of stupendous achievement, cold, weariness, hopelessness pa.s.sed from Chris Travers and swept clean away. The odds that had loomed so large fell into insignificance.
The golf course spread out and became dimly visible as the plane dropped cautiously down. Away to the left there were the few twinkling lights of Gatun Dam, whitening the crests of the waters that tumbled through the spillway. Their drone was dully audible. On every other side dark rolling hills stretched, covered in untamed jungle growth. The golf course was shrouded by them. Its smooth sward made a perfect landing place; an ordinary plane might alight there.
Lower, lower, ever so slowly. A bare one hundred feet, now. Chris scanned the lay of the land. Right close to the spot Kashtanov had chosen to set the plane down on was a deep sand-trap, put there to snare unskilful golfers. Chris steadied himself on the cross-bar.
"I"ll have to go up over the side and grab him," he planned. "Then hold on to his throat till I feel him go limp."
The wheels of the plane touched gently, and she settled to rest.
In one furious movement Chris was off and springing up the side of the fuselage into the single c.o.c.kpit, his hands clutching for the invisible man who sat there.
He heard a croak of alarm; then his fingers thumbed into bare flesh and slid up over a nude shoulder to the throat. They tightened, bored in, held with terrible pressure. Sprawled over the c.o.c.kpit, he clung grimly, to what seemed nothing more than air.
Spattering noises came from somewhere. An unseen body thrashed frantically. Transparent hands clawed over the American"s frame, worried at him. But he held his grip, tightening it each second. There was a gasping, choking sound, a desperate writhe, another scratching of the invisible hands--and then came what Chris had feared, what he could not guard against since his eyes could not forewarn him. A heavy monkey-wrench appeared to rise of its own accord from the floor of the c.o.c.kpit and come swinging at his head.
He ducked at the last second. But it clipped him; his brain whirled dizzily. The next moment he slithered off the plane and fell to the ground, dragging the unseen Kashtanov with him. And as he pitched into the damp gra.s.s, the shock dislodged his grip.
He was up in a flash, but the damage was done. The monkey-wrench curved through the darkness in a vicious swipe that landed it flush against his jaw; swung back, pounded again like a trip-hammer--again and again and again....
Chris reeled back, teetered on the edge of nothingness, then went tumbling crazily down into the sand-trap behind. One leg was doubled underneath him as he crashed.
A voice floated down out of the darkness. "That is the end of you!" it said. But Chris Travers did not hear it....
Pain. Agonizing pain. The whole lower side of his face was a burning, throbbing, aching lump of flesh, and his left leg seemed on fire. What had happened? Where was he?
Then came remembrance, and it was far worse than the fangs of pain that were gnawing him. Chris cried out--a cracked, twisted cry. Kashtanov, the dam--the box of the ray! How much time had pa.s.sed?
He hunched his body over and stared up. Limned against the starlight were the wings of a plane, still standing where it had landed beside the sand-trap. He clutched his thoughts. The plane meant--it meant Kashtanov had gone on his errand, had not yet returned? Only minutes had gone by since the blows from the monkey-wrench. But was the box placed yet? Was Kashtanov already hurrying back?
He listened. From far away came a drone that was separate from the throbbing of his head. The drone of waters, controlled waters. The normal sound of the spillway of Gatun Dam. The box had not yet unleashed its disintegrating bolt of blue.
"I"ve got to stop it!" he whispered.
He tried to rise. Only one leg held. The other twisted awrily with a rasp of broken bones. A spearing pain tore through him. Useless! His fall had broken it. He could not rise, could not walk, much less run. He was no more than a cripple.
"Oh, G.o.d!" he groaned, "How can I, how can I?"
Then his eyes fell on the plane resting above him.
"I"ve got one leg," he muttered, "and two hands and two eyes.... They"re left me. Yes!"
He rolled over. He shoved with his right leg and clawed at the bank of the sand-trap. Inch by inch he wormed up, slipping, sc.r.a.ping. The sand grated into his battered face and seeped through onto his tongue; he coughed and spluttered, groaning from the effort and his feebleness. Spots of blood showed black against the crazy course he left behind him; ages seemed to pa.s.s before he thrust his head over the top of the bank, dug his chin into it and pulled onto level ground. Ages, but in reality only seconds, and the whole Ca.n.a.l--America--lying at the mercy of what each one of those seconds might unloose!
But the plane was near now, and it almost seemed that some unseen force mightier than the strength of men hauled Chris"s broken body to it and up the stretch of its fuselage-side into the c.o.c.kpit.
Ordinarily, he should have been delirious from the pain of jaw and leg, but the controls of the plane were before him and he saw nothing else. Wings and propeller were better than legs! He was in his element: by the sixth sense of born airmen, he knew and could handle any flying machine, no matter how foreign.
In a second, his fingers had fumbled onto the starting b.u.t.ton. The choke of the motor and then its full-throated roar were sweet to his ears.
The lonely golf course and the night re-echoed with the bellow of twelve pistons thrusting in line; watching, one would not have dreamed that a cripple was at the controls of the plane that now swung around with a blast of power, leveled its nose down the course and raced smoothly over close-clipped gra.s.s. Its wheels b.u.mped, spun on the ground and lifted into air.
A mile to the dam! Istafiev"s words came back to him. It would take Kashtanov twenty minutes at least, for he would go cautiously. But how long had pa.s.sed--how long? That was the agonizing question.
Staring forward through the hurtling prop, the night rushed at him; the dark hills melted away to either side; clear ground swept into view and then a long black thread that was the spillway channel. Behind was the bubbling, leaping flow of the spillway itself, and Gatun Dam. The smooth cement sides were as yet unharmed.
"Thank G.o.d!" Chris muttered. "Now, where--where?"
A stream of light flowed out from the hydro-electric station on the left side of the spillway channel. The opposite bank was bare, running right up to the face of the dam beneath the spillway"s seven gates. There the box was to be placed. But from the air, the light was uncertain, deceptive--and a little two-foot-square box was all he had to go by!
"I can"t see!" Chris said hoa.r.s.ely. "I can"t see!"
Like a roaring black meteor the plane hurtled over the banks of the spillway, the eyes of its pilot scouring the ground. It zoomed just in time to miss the wall of the dam, banked, doubled like a scared jack-rabbit, dove down again, coming within feet of the spillway channel. Mad, inspired flying! But what good could it do?
Then from its c.o.c.kpit came a yell.