Bell nodded impatiently. He had smashed the radio, a marvelously compact and foolproof outfit, arbitrarily tuned to a fixed short wave-length. It was almost as simple to operate as a telephone. There had been no opposition to the destruction. Paula's cousin had disabled their plane and reported their presence. He was inside the house now, sick with shame--and yet he would do the same again. In one of the rooms of the house, behind strong bars, a man was kept who had been an object-lesson....

"Is there any machinery?" asked Bell desperately. "Any at all about the place?"

Paula shook her head.

"It may be that there is a pump."

Bell went off savagely, hunting it. He came back and dived into the c.o.c.kpit of the plane. He came out with a wrench, and his jaws set grimly. He worked desperately at the pump. He came back with two short, thick bolts.

He crawled into the plane again, tearing out the fire wall impatiently, getting up under the motor.

"We have one chance in five thousand," he said grimly from there, "of getting away from here to crash in the jungle. Personally, I prefer that to falling into Ribiera's hands. If your cousin or anybody else comes near us, out here, call me, and I'll be much obliged."

There was the sound of sc.r.a.ping, patient, desperate, wholly unpromising sc.r.a.ping. It seemed to go on for hours.

"The wrench, please, Paula."

She pa.s.sed it to him. The bullet had entered the aluminum crankcase of the motor and pierced it through. By special providence it had not struck the crankshaft, and had partly penetrated the crankcase on the other side. Bell had cut it out, first of all. He had two holes in the crankcase, then, through which the cylinder oil had drained away. And of all pieces of machinery upon earth, an aircraft motor requires oil.

Bell's sc.r.a.ping had been to change the punctured holes of the bullet into cone shaped bores. The aluminum alloy was harder than pure aluminum, of course, but he had managed it with a knife. Now he fitted the short bolts in the bores, forced the threads on them to cut their own grooves, and by main strength screwed them in to a fit. He tightened them.

He came out with his eyes glowing oddly.

"The vibration will work them loose, sooner or later," he observed grimly, "and they may not be oil tight. Also, the crankshaft may clear them, and it may not. If we go up in the ship in this state we may get five miles away, or five hundred. At any minute it may fail us, and sooner or later it will fail us. Are you game to go up, Paula?"

She smiled at him.

"With you, of course."

He began to brush off his hands.

"There ought to be oil and gas here," he said briefly. "Another thing, there'll probably be some metal chips in the crankcase, which may stop an oil line at any minute. It's a form of committing suicide, I imagine."

He went off, hunting savagely for the supplies of fuel and lubricant which would be stored at any emergency field. He found them. He was pouring gasoline into the tanks before what he was doing was noticed.

Then there was stunned amazement in the house. When he had the crankcase full of oil the young man came out. Bell tapped his revolver suggestively.

"With no man about this house," he said grimly, "Ribiera will put in one of his own choice. And you have a wife and children and they'll be at that man's mercy. Don't make me kill you. Ribiera may not blame you for my escape if you tell him everything--and you're hurt, anyway.

Either we get away, and you do that, or you're killed and we get away anyhow."

He toppled two last five gallon tins of gasoline into the c.o.c.kpits--crowding them abominably--and swung on the prop. The engine caught. Bell throttled it down, kicked away the stones with which he had blocked its wheels, and climbed up into the pilot's c.o.c.kpit. With his revolver ready in his lap he taxied slowly over to a favorable starting point.

The ship rose slowly, and headed west again. At three thousand feet he cut out the motor to shout to Paula.

"One place is as good as another to us, now. The whole continent is closed to us by now. I'm going to try to find that headquarters and do some damage. Afterwards, we'll see."

He cut in the motor again and flew steadily westward. He rose gradually to four thousand feet, to five.... He watched his instruments grimly, the motor temperature especially. There were flakes of metal in the oil lines. Twice he saw the motor temperature rise to a point that brought the sweat out on his face. And twice he saw it drop again. Bits of shattered metal were in the oiling system, and they had partly blocked the stream of lubricant until the engine heated badly. And each time the vibration had shifted them, or loosened them....

They had left the big amphibian no earlier than nine o'clock. It was noon when they took off for the _fazenda_ of Paula's kin. But it was five o'clock and after when they rose from there with an engine which might run indefinitely and might stop at any second.

Bell did not really expect it to run for a long time. He had worked as much to cheat Ribiera of the satisfaction of a victory as in hopes of a real escape. But an hour, and the motor still ran. It was consistently hotter than an aero engine should run. Twice it had gone up to a dangerous temperature. One other time it had gone up for a minute or more as if the oiling system had failed altogether. But it still ran, and the sun was sinking toward the horizon and shadows were lengthening, and Bell began to look almost hopefully for a clearing in which to land before the dark hours came.

Then it was that he saw the planes that had been sent for him and for Paula.

There were three of them, fast two-seaters very much like the one he drove. They were droning eastward, with all c.o.c.kpits filled, from that enigmatic point in the west. And Bell had descended to investigate a barely possible stream when they saw him.

The leader banked steeply and climbed upward toward him. The others gazed, swung sharply, and came after him, spreading out as they came.

And Bell, after one instant's grim debate, went into a maple leaf dive for the jungle below him. The others dived madly in his wake. He heard a sharp, tearing rattle. A machine-gun. He saw the streaks of tracers going very wide. Gunfire in the air is far from accurate. A machine-gun burst from a hundred yards, when the gun has to be aimed by turning the whole madly vibrating ship, is less accurate than a rifle at six hundred, or even eight. Most aircraft duels are settled at distances of less than a hundred yards.

It was that fact that Bell counted on. With a motor that might go dead at any instant and a load of pa.s.sengers and gas at least equaling that of any of the other ships, mere flight promised little. The other ships, too, were armed, at any rate the leader was, and Bell had only small arms at his disposal. But a plane pilot, stunting madly to dodge tracer bullets, has little time to spare for revolver work.

Bell had but one advantage. He expected to be killed. He looked upon both Paula and himself as very probably dead already. And he infinitely preferred the clean death of a crash to either the life or death that Ribiera would offer them. He flattened out barely twenty yards above the waving branches that are the roof of the jungle. He went scudding over the tree tops, rising where the jungle rose, dipping where it dropped, and behind him the foliage waved wildly as if in a cyclone.

The other planes dared not follow. To dive upon him meant too much chance of a dash into the entrapping branches. One plane, indeed, did try it, and Bell scudded lower and lower until the wheels of the small plane were spinning from occasional, breath taking contacts with the feathery topmost branches of jungle giants. That other plane flattened out not less than a hundred feet farther up and three hundred yards behind. To fire on him with a fixed gun meant a dive to bring the gun muzzle down. And a dive meant a crash.

A stream flashed past below. There was the glitter of water, reflecting the graying sky. A downward current here dragged at the wings of the plane. Bell jerked at the stick and her nose came up.

There was a clashing, despite her climbing angle, of branches upon the running gear, but she broke through and shot upward, trying to stall.

Bell flung her down again into his mad careering.

It was not exactly safe, of course. It was practically a form of suicide. But Bell had not death, but life to fear. He could afford to be far more reckless than any man who desired to live. The plane went scuttling madly across the jungle tops, now rising to skim the top of a monster _ceiba_, now dipping deliberately.

The three pursuing planes hung on above him helplessly while the short, short twilight of the tropics fell, and Bell went racing across the jungle, never twenty feet above the tree top and with the boughs behind him showing all the agitation of a miniature hurricane. As darkness deepened, the race became more suicidal still, and there were no lighted fields nearby to mark a landing place. But as darkness grew more intense, Bell could dare to rise to fifty, then a hundred feet above the tops, and the dangers of diving to his level remained undiminished. And then it was dark.

Bell climbed to two hundred feet. To two hundred and fifty. With more freedom, now, he could take one hand from the controls. He could feel the menace of the tumultuously roaring motors in his wake, but he was smiling very strangely in the blackness. He reached inside his flying suit and tore away the front of his shirt. He reached down and battered in the top of one of the five gallon gasoline tins in the c.o.c.kpit with the barrel of his revolver. He stuffed the sc.r.a.p of cloth into the rent. It was wetted instantly by the splashing. Another savage blow, unheard in the thunder of the motor. In the peculiarly calm air of the c.o.c.kpit the reek of gasoline was strong, but cleared away. And Bell, with the frosty grim smile of a man who gambles with his life, struck a light. The cloth flared wildly, and he reached his hands into the flame and heaved the tin of fuel overside.

The cloth was burning fiercely, and spilled gasoline caught in mid-air. A fierce and savage flame dropped earthward. Spark on the cloth, and the cloud of inflammable vapor that formed where the leaking tin fell plummetlike, carried the flame down when the wind of its fall would have blown it out.

The following planes saw a flash of light. They saw a swiftly descending conflagration tracing a steep arch toward the tree tops.

They saw that flaming vanish among the trees. And then they saw a vast upflaring of fire below. Flames licked upward almost to the tree tops....

Bell looked back from two thousand feet. Wing-tip lights were on, below, and disks of illumination played upon the roof of the jungle above the fire. The three planes were hovering over the spot. But a thick dense column of smoke was rising, now. Green things shriveling in the heat, and dried and rotted underbrush. Altogether, the volume of smoke and flame was very convincing evidence that an airplane had burst into flame in mid-air and crashed through the jungle top to burn to ashes beneath.

But Bell climbed steadily to five thousand feet. He cut out the motor, there, and in the shrieking and whistling of wind as the plane went into a shallow glide, he spoke sharply.