spider webs. But the man who had been wearing it had sprung instantly into view beneath the cluster of electric lights. He was a fair-haired young fellow of about thirty years, his features white and set in the agony of death.
He was dressed in a trim uniform of black, with silver braid, and on his shoulders were the insignia of a lieutenant. He opened his eyes, blue as the skies, and stared about him. He seemed to understand what had happened to him.
"Dogs!" he muttered.
Shrieks of fury answered him. The mob surged toward him as if to grind his face to pieces under their feet – and then recoiled, mouthing and gibbering. But it was at Dick that they were looking, not at the dying man.
He raised himself upon one elbow with a mighty effort. "His Majesty the Invisible Emperor! Long be his reign triumphant!" he chanted. It was his last credo. The words broke from his lips accompanied by a torrent of red foam. His head dropped back, his body slipped down; he was gone. And no one seemed to observe his passing. They were all screaming and gibbering at Dick.
"Rennell! Rennell!" yelled Stopford. "Where are you, Rennell? God, man, what's happened to your legs?"
Dick looked down at himself. For a moment he had the illusion that he was a head and a trunk, floating in the air. His lower limbs had become invisible, except for patches of trousering that seemed to drift through space. The mob in the room had fallen back gaping at him in horror.
Then Dick understood. It was the invisible garment that had coiled itself about him. He tore it from him and became visibly a man once more.
Shouts from another room! A surging movement of the crowd toward it. The muffled sounds of an automatic pistol, fitted with a silencer! Then screams:
"The devils are in there! They're murdering the soldiers!"
There followed a panic-stricken rush, more muffled firing, and then the sharp roar of rifles, and the fall of plaster. Some one was bawling the President's name. The rooms became a mass of milling human beings, lost to all self-control.
A bedlam of noise and struggle. Men fought with one another blindly, cursing soldiers fired promiscuously among the mob, riddling the walls, stabbing at the air. The plaster was falling in great chunks everywhere, filling the rooms with a heavy white cloud, in which all choked and struggled. The yells of the civilian mob below, struggling helplessly in the packed crowd that wedged the great stairway, made babel. Outside the White House a dense mob that filled the lawns was yelling back, and struggling to gain admittance. Suddenly the lights went out.
"They've cut the wires!" rose a wild, wailing voice. "The devils have cut the wires! Kill them! Kill everybody!"
His cry ended in a gurgle. Somewhere in that dark hell a struggle was going on, a well defined struggle, different from the random, aimless battling of the half-crazed soldiers and the civilians. President Hargreaves was still within the walls of the White House, it was known; it was physically impossible for him to have been carried away when every foot of space was packed. And through that darkness the invisible assailants were edging him, foot by foot, toward the outside.
Dick was on the edge of this silent battle. He sensed it. Bracing himself against a bureau, while the mob surged past him, he tried to pierce the gloom, to reinforce with his perceptions what his instinct told him. A soldier, crazed with fear, came leaping at him, bayonet leveled. He thrust with a grunt. Dick avoided the glancing steel by a hand's breadth, and, as the impetus of the man's attack carried him forward, caught him beneath the chin with a stiff right-hand jolt that sent him sprawling.
From below the cries broke out again, with renewed violence: "They've got the President! Get them! Get them! Close all doors and windows!"
But a door went crashing down somewhere, to the tune of savage yells. The mob was pouring down the stairs. It was growing less packed above. Dick heard Stopford's voice calling his name.
"Here, sir" he shouted back, and the two men collided.
"For God's sake do what you can, Rennell!" shouted the Colonel. "They've got the President downstairs. They had him in this very room, in the thick of it all. I heard him cry out, as if under a gag. They put one of those damned cloths over him. God, Rennell, I'm going crazy!"
The upper floor of the White House was almost empty now. Dick thrust himself into the crowd that still jammed the stairs. He reached the ground floor. It was lighter here, but a glance showed him that it was impossible to attempt to restore any semblance of order. The big East Room was jammed with a fighting, cursing throng. Dick stumbled over the bodies of those who had fallen in the press, or had been shot down. Outside the mob was thickening, swarming through the grounds and screeching like madmen.
Nothing that could be done! Dick found himself caught once more in the human torrent. Presently he was wedged up against a broken window. He precipitated himself through the frame, dropped to the ground, stopped for an instant to catch breath.
The yelling mob was congregated about the main entrance of the White House, and on this side the grounds were comparatively empty. As Dick stopped, trying desperately to form some plan of action, he heard footsteps and low voices near him. Then two men came toward him, followed by three or four others.
The men – but, though the light was faint, Dick realized instantly that they were wearing invisible garments. He could see nothing of them; he could see through where they seemed to be – the trees, the buildings of the streets. Yet they were at his elbow. And they saw him. He heard one of them leap, and sprang aside as the butt of a pistol descended through the air and dropped where his head had been.
Yet no hand had seemed to hold it. It had been a pistol, reversed, and flashing downward, to be arrested in mid-air six inches from his face. But the men were not wholly invisible. Nearly six feet above the ground, three or four pairs of eyes were staring malevolently into Dick's. Only the eyes were there.
The two foremost men were breathing heavily. They were carrying something. Grotesquely through a rent in the invisible garment Dick saw a patch of trouser. He heard a muffled sigh. President Hargreaves, in the hands of his abductors!
Dick's actions were reflex. As the pistol hung beside his face, he snatched at it, wrested it away, struck with it, and heard a curse and felt the yielding impact of bone and flesh. He had missed the head but struck the shoulder. Next moment hands gripped the weapon, and a desperate struggle began.
It was torn from Dick's grasp. He struck out at random, and his fist collided with the chin of a substantial flesh and blood human being. Invisible arms grasped him. He fought free. The pistol slashed his face sidewise, the sight ripping a strip of flesh from the cheek. He was surrounded, he was being beaten down, though he was fighting gamely.
"Kill the swine! Shoot! Shoot!" Dick heard one of his assailants muttering.
Out of the void appeared the blue muzzle of another automatic, with a silencer on it. Dick ducked as a flame spurted from it. He felt the bullet stir his hair. He grasped at the hand that held it, and missed. Then he was held fast, and the muzzle swung implacably toward his head again. Helpless, he watched it describe that arc of death. It was only later that he wondered why he had fought all the while in silence, instead of crying for help.
But of a sudden the pistol was dashed aside. A woman's voice spoke peremptorily, in some language Dick did not understand. And he saw her eyes among the eyes that glared at him. Dark eyes that he knew, even if the voice had not revealed her identity. The eyes and voice of Fredegonde Valmy!
Dick cried her name. He put forth all his strength in a final struggle. Suddenly he felt a stunning impact on the back of the head. He slipped, reeled, threw out his hands, and sank down unconscious on the grass at the side of the path.
CHAPTER IV
The Invisible Ambassador
Fredegonde Valmy implicated in the conspiracy! That was the first thought that flashed into Dick's mind as he recovered consciousness. He might have suspected it! But the idea that the girl he loved was bound up with the murderous gang that was attacking the very foundations of civilization chilled