by Unknown
"Come on now, you fellows," came the voice of Hart Jones from the hangar entrance, "there's no time to lose. The Pioneer takes off immediately after the big fellow."
We hurried to the waiting ship, which seemed like a tiny toy when compared with the giant SF-22. I had observed very little of the construction of the Pioneer, but I could now see that she was quite different in design from the ordinary plane. A monoplane she was, but the wing structure was abnormally short and of great thickness, and there were a number of tubes projecting from the leading edge that gave the appearance of a battery of small cannon. The body, like all planes designed for travel in air-level six, was cigar-shaped, and had hermetically sealed ports and entrance manholes. A cluster of the cannon-shaped tubes enclosed the tail just back of the fins and rudder and, behind the wing structure atop the curved upper surface of the body, there was a sphere of gleaming metal that was probably three feet in diameter.
* * * * *
Before I could formulate questions regarding the unusual features of the design, we were within the Pioneer's cabin and Hart Jones was engaged in clamping the entrance manhole cover to its rubber seat. A throbbing roar that penetrated our double hull attracted my attention and, looking through a nearby porthole, I saw that the convoy of army planes had taken off and was circling over the SF-22 in anticipation of her start. Trim, speedy fighting ships these were, with heavy caliber machine-guns in turrets fore and aft and normally manned by crews of twelve each. The under surfaces of their bodies glistened smooth and sleek in the light from the field, for the landing gears had been drawn within and the openings sealed by the close-fitted armor plate that protected these ordinarily vulnerable portions when in flight.
The SF-22 was ready to take off and the crowds were drawing back into the obscurity beyond the huge circle of blinding light. One after another her twelve engines sputtered into life, and ponderously she moved over the field, gathering speed as the staccato barking of the exhausts gradually blended into a smooth though deafening purr. The tail of the great vessel came up, then the wheels, and she was off into the night.
* * * * *
Hart Jones sat at a bewildering array of instruments that covered almost the entire forward partition of the cabin. He pressed a button and the starting motor whined for a moment. Then the single engine of the Pioneer coughed and roared. Slowly we taxied in the direction taken by the SF-22, whose lights were now vanishing in the darkness. I saw George open a valve on the wall and Hart stretched the fingers of his left hand to what appeared to be the keyboard of a typewriter set into the instrument board. He pressed several of the keys and pulled back his stick. There was a whistling scream from astern and I was thrown back in my seat with painful force. With that, the motor roared into full speed and we had left the airport far behind.
"What on earth?" I gasped.
"Rocket propulsion," laughed Hart. "I should have warned you. Those tubes you saw outside at the tail and along the leading edge of the wings. Only used three of them, but that was sufficient for the take-off."
"But I thought this rocket business was not feasible on account of the wastage of fuel due to its low efficiency," I objected.
"We should worry about fuel," said Hart.
I looked about me and saw that there was very little space for the storage of this essential commodity. "Why?" I inquired. "What fuel do you use?"
"Make our own," he replied shortly. He was busy at the moment, maneuvering the Pioneer into a position above and behind the SF-22 and her convoy.
"You make your own fuel enroute?" I asked in astonishment.
"Yes. That sphere you saw on top. It is the collecting end of an electrical system for extracting nitrogen and other elements, from the air. This extraction goes on constantly while we are in the atmosphere and my fuel is an extremely powerful explosive of which nitrates are the base. The supply is replenished continuously, so we have no fear of running short even in the upper levels."
* * * * *
George had crawled through a small opening into some inaccessible region in the stern of the vessel. I pondered over what Hart had just told me, still keeping my eyes glued to the port, through which could be seen the fleet we were following. The altimeter registered thirty-five thousand feet. We were entering air-level six--the stratosphere! Below us the troposphere, divided into five levels, each of seven thousand feet, teemed with the life of the air. The regular lanes were filled with traffic, the lights of the speeding thousands of freight and pleasure craft moving in orderly procession along their prescribed routes.
Up here in the sixth level, which was entirely for high-speed traffic of commercial and government vessels making transcontinental or transoceanic voyages, we were the only adventurers in sight--we and the convoyed liner we were following. The speed indicator showed six hundred miles an hour, and the tiny spot of light that traveled over the chart to indicate our position showed that we were nearing Buffalo.
Glancing through one of the lower ports, I saw the lights of the city shining dimly through a light mist that fringed the shore of Lake Erie and extended northward along the Niagara. Then we were out over the lake, and the luminous hue was slipping rapidly behind. I looked ahead and saw that the distance to the SF-22 and her convoy had somewhat increased. We were a mile behind and some two thousand feet above them. Evidently Hart was figuring on keeping at a safe distance for observation of anything that might happen.
* * * * *
Our motor was running smoothly and the angle of the propeller blades had been altered to take care of the change in air density from the lower altitudes. It flashed across my mind that this was an ideal location for an attack, if such was to be made on the SF-22.
Then, far ahead, I saw a beam of light stab through the darkness and strike the tossing surface of the lake. Another and another followed, and I could see that the SF-22 and her convoy were surrounded by these unearthly rays. They converged from high above to outline a brilliant circle where they met on the surface of the waters, and in the midst of the cone formed by the beams, the liner and its seven tiny followers could be seen to falter, and huddle more closely together.
It all happened in the twinkling of an eye--so quickly, in fact, that Hart and I had not the time to exchange remarks over the strange occurrence. For a moment the eight vessels hovered, halted suddenly by this inexplicable force from out the heavens. Then there rose from the apex of the inverted cone of light a blinding column of blue-white radiance that poured skyward an instant and was gone. To our ears came a terrific roaring that could be likened to nothing we had heard on earth. The Pioneer was tossed and buffeted as by a cyclone, and George came tumbling from the opening he had entered, his round face grown solemn. Then came eery silence, for the Pioneer's motor had gone dead. Ahead there was utter darkness. The liner and her convoy had completely vanished and the Pioneer was slipping into a spin!
* * * * *
"What's up?" asked George of Hart, who was tugging frantically at the controls.
"The liner has gone the way of the first two," he replied: "and the yarn about the pillar of fire was not so far wrong after all."
"You saw the same thing?" asked George incredulously.
"Yes, and so did Jack. There came some beams of light from the sky; then the pillar of fire and the roaring you heard, after which the vessels were gone and our electrical system paralyzed."
"Holy smoke!" ejaculated George. "What to do now?"
As he spoke, the Pioneer came out of the spin, and we were able to resume our positions in the seats. None of us was strapped in, and we had been clinging to whatever was handiest to keep from being tossed about in the cabin. Hart wiped his forehead and growled out an oath. The instrument board was still illuminated, for its tiny lamps were supplied with current from the storage battery. But the main lights of the cabin and the ignition system refused to function. We were gliding now, but losing altitude rapidly, having already dropped to the lower limits of level five.
"Can't
you use the rocket tubes?" I inquired hesitatingly.
"They are fired in the same manner as the motor," replied Hart; "but we might try an emergency connection from the storage battery, which is ordinarily used only in starting and for the panel lights."
* * * * *
George was already fussing with the connections in a small junction box from which he had removed the cover. Meanwhile, the black waters of Lake Erie were rushing upward to meet us, and the needle of the altimeter registered twelve thousand feet.
"Here's the trouble!" shouted George, triumphantly holding up a small object he had removed from the junction box. "Ignition fuse is blown."
"Probably by some radiations from the cone of light and the column that destroyed the liner. Lucky we were no closer," were Hart's muttered comments.
George produced a spare fuse and inserted it in its proper place. The cabin lights glowed instantly and the motor started at once.
"Well, I'm going up after the generators of this mysterious force that is destroying our cross-country ships and killing our people," asserted Hart. "The rays came from high above, but the Pioneer can go as high as anything that ever flew--higher."
He snapped a switch and a beam of light that rivalled the so-called pillar of fire bored far into the night, dimming the stars by its brilliance. Again his fingers strayed to the rows of white keys and the rocket tubes shrieked in response to his pressure. This time I was prepared for the shock of acceleration, but the action was maintained for several seconds and I found the pressure against my back growing painful. Then it was relieved, and I glanced at the altimeter. Its needle had reached the end of the scale, which was graduated to eighty thousand feet!
"Good Lord!" I exclaimed. "Do you mean to tell me that we are more than sixteen miles in the air?"
"Nearly thirty," replied Hart, pointing to another dial which I had not seen. This one was graduated in miles above sea-level, and its needle wavered between the twenty-nine and thirty mark!
* * * * *
Again Hart pressed the rocket buttons, and we shot still higher into the heavens. Thirty, forty, fifty miles registered the meter, and still we climbed.
"Great Scott!" blurted a voice I knew was my own, though I had no consciousness of willing the speech. "At this rate we'll reach the moon!"
"We could, if we wished," was Hart's astounding reply; "I wish you wouldn't say too much about it when we return. We have oxygen to breathe and an air-tight vessel to retain it. With the fuel we are using, we could easily do it, provided a sufficient supply were available. However, the Pioneer does not have large enough storage tanks as yet, and, of course, we cannot now replenish our supply with sufficient rapidity, for the atmosphere has become very rare indeed--where we are. My ultimate object, though, in building the Pioneer, was to construct a vessel that is capable of a trip to the moon."
"You think you could reach a great enough velocity to escape the gravitational pull of the earth?" I asked, marveling more and more at the temerity and resourcefulness of my science-minded friend.
"Absolutely," he replied. "The speed required is less than seven miles a second, and I have calculated that the Pioneer can do no less than twenty."
Mentally I multiplied by sixty. I could hardly credit the result. Twelve hundred miles a minute!
"But, how about the acceleration?" I ventured. "Could the human body stand up under the strain?"
"That is the one problem remaining," he replied; "and I am now working on a method of neutralizing it. From the latest results of our experiments, George and I are certain of its feasibility."
* * * * *
The Pioneer was now losing altitude once more, and Hart played the beam of the searchlight in all directions as we descended. He and George watched through one of the floor ports and I followed suit. We were falling, unhampered by air resistance, and our bodies were practically weightless with reference to the Pioneer. It was a strange sensation: there was the feeling of exhilaration one experiences when inhaling the first whiff of nitrous oxide in the dentist's chair--a feeling of absolute detachment and care-free confidence in the ultimate result of our precipitous descent.
I found considerable amusement in pushing myself from side to side of the cabin with a mere touch of a finger. There was no up nor down, and sometimes it seemed to me that we were drifting sideways, sometimes that we fell upward rather than downward. Hart and George were unconcerned. Evidently they were quite accustomed to the sensations. They bent their every energy toward discovering what had caused the disaster to the SF-22 and its convoy.
For several hours we cruised about on the strangest search ever made in the air. Alternately shooting skyward to unconscionable altitudes and dropping to levels five and six to replenish our fuel supply, we covered the greater portion of the United States before the night was over. But the powerful searchlight of the Pioneer failed to disclose anything that might be remotely connected with the disappearance of the SF-22.
For me it was a never-to-be-forgotten experience. Lightning dashes from coast to coast which required but a few minutes of time--circling many miles above New York or Washington or Savannah in broad daylight with the sun low on the up-curved horizon; then shooting westward into the darkness and skirting the Pacific coast less than fifteen minutes later, but with four hours' actual time difference. Space and time were almost one.
* * * * *
Hart had not provided the Pioneer with a radio or television transmitter, but there was an excellent receiver, and, through its agency we learned that the world was in a veritable uproar over the latest visitation of the mysterious terror of the sixth air level. All commercial traffic in levels four, five and six was ordered discontinued, and the government air control stations were flashing long messages in code, the import of which could but be guessed. Vision flashes showed immense gatherings at the large airports and in the public squares of the great cities, where the general populace become more and more excited and terrified by the awful possibilities pictured by various prominent speakers.
The governments of all foreign powers made haste to disclaim responsibility for the air attacks or for any attempt at making war on the United States. News broadcasts failed to mention Hart Jones or the Pioneer, since the mission had been kept secret. The phenomenon of the rays and the roaring column of light had been observed from many points on this occasion and there was no longer any doubt as to the nature of the terror as visible to the eye, though theories as to the action and source of the rays conflicted greatly and formed the basis of much heated discussion.
Eventually the advancing dawn reached San Francisco, and with its advent Hart decided to make a landing in that city so that my bonds could be delivered.
* * * * *
Jones was apparently a very much mystified and discouraged man. "Jack," he said, "it seems to me that this thing is but the beginning of some tremendous campaign that is being waged against our country by a clever and powerful enemy. And I feel that our work in connection with the unraveling of the mystery and overcoming the enemy or enemies is but begun. It's a cinch that the thing is organized by human minds and is not any sort of a freak of the elements. Our work is cut out for us, all right, and I wish you would stick to George and me through the mess. Will you?"
"Sure," I agreed, readily enough. "After these bonds are delivered I am free for a month."
"Ha! Ha!" cackled George, without mirth. "A month! We're doggoned lucky if we get to the bottom of this in a year."
"Nonsense!" snapped Hart, who was considerably upset by the failure to locate the source of the disastrous rays. "There is nothing supernatural about this, and anything that can be explained on a scientific basis can be run to earth in short order. These rays are man-made and, as such, can be accounted for by man. Our greatest scientists must be put to work on the problem at once--in fact, they have quite probably been called in by the government already."
* * * * *
He was maneuvering the Pioneer to a landing on the broa
d field of the San Francisco airport. Hundreds of idle planes of all sizes lined the field, and, unmindful of the earliness the hour, a great crowd was collected in expectation of sensational reports from the occupants of arriving ships. The unusual construction of the Pioneer attracted considerable attention and it was with difficulty that the police kept back the crowd when she rolled to a stop near the office of the local government supervisor. We hustled inside and were greeted by that official with open arms.
"Glory be!" he exclaimed. "Hart Jones and the Pioneer. Every airport in the land has been on the lookout for you all night. It was feared you had been lost with the SF-22 and the others. Code messages to the supervisors of all districts advised of your mission, though it has been kept out of the general news, as has the message from the enemy."
"Message from the enemy!" gasped Hart, George and I, echoing the words like parrots.
"Yes. A demand that the United States surrender, and a threat to descend into the lower levels if the demand is not complied with in twenty-four hours!"
"Who is this enemy?" asked Hart, "and where?"
"Who they are is not known," replied the official gravely; "and as to the location, the War Department is puzzled. Direction finders throughout the country took readings on the position of their radio transmitter and these readings differed widely in result. But the consensus of opinion is that the messages originate somewhere out in space, probably between fifty and one hundred thousand miles from our earth."
"Great guns!" Hart glanced at George and me, where we stood with stupidly hanging jaws. "And what does the government want of me now?"
"You are considered to be the one man who might be able to cope with the problem, and are ordered to report to the Secretary of War, in person, immediately."
* * * * *
Hart was electrified into instant activity. "Here," he said in a voice of authority that commanded the official's attention and respect, "see that this package of bonds is delivered at once to the addressee and that the addressor is advised of its safe arrival. We're off at once."
