Chapter 5

_The Enemy Strikes_

As Dick's airship veered and side-slipped, he kicked hard on the left rudder and brought the nose around. Furiously he sprayed the air with a leaden hail from his quick-firer. He heard a rush of wind go past him, and realized that his unseen antagonist had all but rammed him.

Yet nothing was visible at all, save the moon and the empty sky. He had heard the rush of the prop-wash, but he had seen nothing, heard nothing else. Incredible as it seemed, the pilot was flying a plane that had attained not merely invisibility but complete absence of all sound.

Dick side-slipped down, pancaked, and crashed. He emerged from a plane wrecked beyond hope of early repair, yet luckily with no injury beyond a few minor bruises. He rushed toward the hangar, to encounter a bevy of scared mechanics.

"Another plane! Rev one up quick!" he shouted.

Planes were already being wheeled out, pilots in flying suits and goggles were striding beside them. Dick ordered one of them away, stepped into his plane, and in a moment was in the air again.

In the minute or two that had elapsed since the encounter, the enemy had been active. Crash after crash was resounding from various parts of Washington. Buildings were rocking and toppling, débris strewed the streets, fires were springing up everywhere. A thousand feet aloft, Dick could see the holocaust of destruction that was being wrought by the infernal missiles.

Bombs of such power had been the unattained ambition of every government of the world--and it had been left to the men of the Invisible Emperor to attain to them. Whole streets went into ruin at each discharge and from everywhere within the city the wailing cry of the injured went up, in a resonant moan of pain.

In the central part of the city, the district about F Street and the government buildings, nothing was standing, except those buildings fashioned of structural steel, and these showed twisted girders like the skeletons of primeval monsters, supporting sections of sagging floors. Houses, hotels had melted into shapeless heaps of rubble, which filled the streets to a depth of a dozen yards, burying everything beneath them. Yet here and there could be seen the forms of dead pedestrians, motor-cars emerging out of the débris, lying in every conceivable position; horses, horribly mangled, were shrieking as they tried to free themselves. And yet, despite this ruin, the general impression upon Dick's mind, as he beat to and fro, signaling to his flight to spread, was that of a vast, empty desolation.

* * * * *

Further away: where the ruin had not yet fallen, thousands of human beings were milling in a mass, those upon the fringes of the crowd perpetually breaking away, other swarms approaching them, so that the entire agglomeration resembled a seething whirlpool turning slowly upon itself.

Then of a sudden the strains of the national anthem floated up to Dick's ears. A band was playing in the White House grounds. The tune was ragged, and the drum came in a fraction of a second late, but an immense pride and elation filled Dick's soul.

"They'll never beat us!" he thought, intensely, "with such a spirit as that!"

He had signaled his flight to spread, and search the air. He could see the individual ships darting here and there over the immensity of the city, but none knew better than he how fruitless their effort was. And the marauders had not ceased their deadly work.

A bomb dropped near the Washington Monument, sending up a huge spout of dust that veiled it from his eyes. Instinctively Dick shot toward the scene. Slowly the dust subsided, and then a yell of exultation broke from Dick's lips. The noble shaft still stood, a slim taper pointing to the skies.

It was an omen of ultimate success, and Dick took heart. No, they'd never beat the grim, unconquerable tenacity of the American people.

Yet the damage was proceeding at a frightful rate. A bomb dropped squarely on the Corcoran Gallery and resolved it into a heap of silly stones. A bomb fell in the middle of Pennsylvania Avenue, and the houses on either side collapsed like houses of cards, falling into a sulphurous, fiery pit. And still there was nothing visible but the sky and the moon.

* * * * *

Dick gritted his teeth and swore as he circled over the site of destruction, out of which tiny figures were struggling. He heard the clang of the fire bells as the motor trucks came roaring toward the scene. Then crash! again. Five blocks northward another dense cloud of dust arose, and the new area of destruction, spreading as swiftly as ripples over a pond, joined the former one, leaving a huge, irregular open space, piled up with masonry and brick in a number of flat-topped pyramids.

Into this, houses went crashing every moment, with a sound like the clatter of falling crockery, but infinitely magnified.

"The devils! The swine!" shouted Dick. "And we gave Von Kettler the privileges of an ambassador!"

And Fredegonde was the sister of this devil! The remembrance of that struck a cold chill to Dick's heart again. He tried to blot out her picture from his mind, but he still saw her as she had appeared that day after the air ride, flushed, smiling, radiant in her dark beauty.

A murderess and a spy! He cursed her as he banked and circled back. He was helpless. He could do nothing. And all Washington would be destroyed by morning, if the supply of bombs kept up. But there was more to come. Suddenly Dick became aware that two of his flight, at widely separated distances, were going down in flames. Flaming comets, they dropped plump into the destruction below. Another caught fire and was going down. No need to question what was happening.

The invisible enemy was attacking his flight and picking off his men one by one!

He drove furiously toward two of his planes whose erratic movements showed that they were being attacked. As he neared them he saw one catch fire and begin its earthward swoop. Then the fuselage crackled beside him, and his instrument board dissolved into ruin. Instinctively he went round in a tight bank and loosed his machine-gun. Nothing there! Nothing at all! Yet his right wing went ragged, and his own furious blasts into the sky, their echoes drowned by the roar of his propeller, were productive of nothing.

* * * * *

He shot past the uninjured plane, signalling it to descend. He wasn't going to let his men ride aloft to helpless butchery. Nothing could be done until some means was discovered of counteracting the enemy's terrific advantage.

He darted across the heart of the city to where another of the flight was circling, waggling his wings to indicate to it to descend. Then on to the next plane and the next, shepherding them. Thank God they understood! They were bunching toward the hangar. Yet another took fire and dropped, a burning wreck. Half his flight out of commission, and not an enemy visible!

He was aloft alone now, courting death--instant, invisible death. He wouldn't descend until that carnival of murder was at an end. But it was not at an end. Another crash, far up Pennsylvania Avenue, showed an attempt upon the Capitol. Again--again, and a smoking hell wreathed the noble buildings so that it was no longer possible to see them. A lull, and then a crash nearer the city's heart. Crash! Crash!

Invisible though the enemy was, it was easy to trace the movements of this particular plane by the successive areas of destruction that it left behind it. It was coming back over Pennsylvania Avenue, dropping its bombs at intervals. It was methodically wiping out an entire section of Washington.

Dick drove his plane toward it. There was one chance in a thousand that, if he could accurately gauge the progress of his invisible antagonist, he could crash him and go down with him to death. If he could get close enough to feel his prop-wash! A wild chance, but Dick's mind was keyed up to desperation. He shot like an arrow toward the scene, with a view to intercepting the murderer.

Then of a sudden he became aware of a curious phenomenon. A black beam was shooting across the sky. A black searchlight! It came from the flat top of a large hotel that had somehow escaped the universal destruction, and, with its gaunt skeleton of structural steel showing in squares, towered out of the ruin all about it like an island.

* * * * *

It was from here that the black beam started. It spread fanwise across the sky. But it was not merely blackness. It was utter and impenetrable darkness, cleaving the sky like a knife. Where it passed, the rays of the moon were extinguished as fire is extinguished by water.

A beam of absolute blackness, that pierced the air like a widening cone, and made the night seem, by contrast, of dazzling brightness along either dark border.

High into the air that dark beam shot, moving to and fro in the sky. Dick, darting toward the spot where he hoped to find his invisible enemy, found himself caught in it.

In utter, inextinguishable darkness! Like a trapped bird he fluttered, hurling himself this way and that till suddenly he found himself blinking in the dazzling light of the moon again, and the black beam was overhead.

Crash! Another widening sphere of ruin as the invisible marauder dropped a bomb. Dick cursed bitterly. Trapped in that black beam, he had lost his direction. The invisible plane had shot past the point where he had hoped to intercept it.

He flung his soaring lever, and hung suspended in the air. An easy mark for the enemy, if he chose to take the opportunity. No matter. Death was all that Dick craved. He had seen half his flight wiped out, and a hundred thousand human beings hurled to destruction. He wanted to die.

Then suddenly a wild shout came to his ears, as if all Washington had gone mad with triumph. And Dick heard himself shouting too, before he knew it, almost before he knew why.

* * * * *

For overhead, where the inky finger searched the sky, a luminous shape appeared, a silvery cigar, riding in the void. The finger missed it, and again there was only the moonlight. It caught it again--and again the whole devastated city rang with yells of derision, hate, and anger as the black beam held it.

It held it! To and fro that silvery cigar scurried in a frantic attempt to avoid detection, and remorselessly the black beam held it down.

It held it down, and it outlined it as clearly as a figure on the moving picture screen. Then suddenly there came a flash, followed by a dull detonation, and a black cloud appeared, spreading into a flower of death near the cigar, and at the edge of the black beam. The cheers grew frantic. The anti-aircraft battery in the White House grounds had grasped the situation, and was opening fire.

To and fro, like a trapped beast, the cigar-shaped airplane fled. Once it seemed to escape. It faded from the edge of the black finger--faded into nothingness amid a roar of execretion. Then it was caught and held.

Truncated, bounded by an arc of sky, the black finger followed the murderer in his flight remorselessly. And all around him the anti-aircraft guns were placing a barrage of death.

He was trapped. No need for Dick to rush in to battle. To do so might call off that deadly barrage that held the murderer in a ring of death. Hovering, Dick watched. And then, perhaps panic-stricken, perhaps rendered desperate, perhaps through sheer, wanton courage that might have commanded admiration under nobler circumstances, the airship turned and drove straight in the direction of the battery, dropping another bomb as she did so.

* * * * *

It fell in a crowded street, swarming with spectators who had clambered upon the fallen débris, and it wrought hideous destruction. But this time there was hardly a cry--no unison of despair such as had come to Dick's ears before. The suspense was too tense. All eyes watched the airship as, seeming to bear a charmed life, she drove for the White House itself, through a ring of shells that widened and contracted alternately, with the object of placing a last bomb squarely upon the building before going down in death. And all the while the black searchlight held it.

Dick Rennell was to experience many thrilling moments afterward, but there was never a period, measurable by seconds, yet seeming to extend through all eternity--never a period quite so fraught with suspense as, hovering there, he watched the flight of that silvery plane speeding straight toward the executive mansion while all around it the shells bloomed and spread. It was over the White House grounds. The archies had failed; they were being outmaneuvered, they could not be swung in time to follow the trajectory of the plane. Dick held his breath.

Then suddenly the silvery ship dissolved in a blaze of fire, a shower of golden sparks such as fly from a rocket, and simultaneously the last bomb that she was to drop broke upon the ground below.

Down she plunged, instantly invisible as she escaped the finger of the black beam; but she dropped into the vortex of ruin that she herself had created. Into a pit of blazing fire, criss-crossed by falling trees, that had engulfed the battery and a score of men.

Then suddenly Dick understood. He flung home the soaring lever, banked, and headed, not for the White House, but for the flat roof of the hotel from which the black searchlight was still projecting itself through the skies. He hovered above, and dropped, light as a feather, upon the rooftop.

* * * * *

There was only one person there--an old man dressed in a shabby suit, kneeling before a great block of stone that had been dislodged upward from the parapet and formed a sort of table. Upon this table the old man had placed a large, square box, resembling an exaggerated kodak, and it was from the lens of this box that the black beam was projecting.

Dick sprang from his cockpit as the old man rose in alarm. He ran to him and caught him by the arm.

"Luke Evans!" he cried. "Thank God you've come back in time to save America!"