"We have still six minutes, sir; and this is an affair of long standing, and on which I feel deeply. The score is settled," he said with entire respect. "I am now at your command. I had intended," he went on in a frivolous tone again, "to kick to you on my gas bill. It is too large.

You, as responsible head, know it is. But somehow, you know, the presence here of you gentlemen has disarmed me. You don't need to be here; you all have the facilities to get away. Here you are! I guess you can charge a dollar and a quarter for gas if you want to." He looked from one to the other, while he carefully wiped back the blood that was flowing from the little wound in his forehead. "Eldridge acknowledges he has failed," he repeated.

"I fail to see how you have improved upon that failure," snapped Eldridge, stung.

"No?" queried Darrow. "I call Hallowell to witness that the game has been fair. We had an even start; the data have been open to both." He raised his voice a little. "Jack!" he called.

Immediately through the open door from the hall outside came Jack Warford, leading by the arm a strange and nondescript figure. It was that of a small, bent, old-looking man, dressed in a faded suit of brown. His hair was thin, and long, and white; his face sharp and lean. His gaze was fixed straight before him, so that every one in the room at the same instant caught the glare of his eyes.

They were fixed, those eyes, like an owl's; or, better, a wildcat's, as though they never winked. From the pupils, which were very small, the little light-colored lines radiated across very large blue irises. There was something baleful and compelling in their glare, so that even Hallowell, cool customer as he was, forgot immediately all about the man's littleness and shabbiness and bent figure, and was conscious only of the cruel, clever, watchful, unrelenting, hostile spirit. As Jack dragged him forward, the others could see that one foot shambled along the floor.

"Gentlemen," observed Darrow in his most casual tones, "let me present Monsieur X!"

Every one exclaimed at once. Above the hubbub came Lyons' voice, clear and commanding.

"The proof!" he thundered. "This is too serious a matter for buffoonery.

The proof!"

Percy Darrow raised his hand. Through the roar of the maddened city the bell of the Metropolitan tower was beginning its chimes. By the third stroke the uproar had died almost away. The people were standing still, awaiting what might come.

The sweet-toned chimes ceased. There succeeded the pause. Then the great bell began to boom.

_One--two--three--four--five--six_ came its s.p.a.ced and measured strokes.

The last reverberations sank away. Nothing happened. Percy Darrow let his hand fall.

"The proof," he repeated, "is that you are still here."

From the night outside rose a wild shriek of rejoicing, stupendous, overwhelming, pa.s.sionate. Paige sprang across the room. "Release!" he shouted fairly in Simmons' ear. The spark crashed. And at a dozen places simultaneously bulletins flashed; at a dozen other points placarded balloons arose, on which the search-lights played; so that the people, hesitating in their flight in thankfulness over finding themselves still alive, raised their eyes and read:

Monsieur X is captured. You are safe.

At that a tumult arose, a tumult of rejoicing.

Darrow had sauntered to the window, and was looking out. From the great height of the Atlas Building he could see abroad over much of the city.

Here and there, like glowing planets, hung the balloons.

"Clever idea," he observed. "I'm glad you thought of it."

Hallowell was on his feet, his eyes shining.

"I've got the only paper on the job!" he fairly shouted. "Darrow, as you love me, give me the story. Where was he? Where did you get him?"

Darrow turned from the window, and sardonically surveyed Eldridge.

"He was in the office next door," said he, after a moment.

CHAPTER XXII

THE MAN NEXT DOOR

When, three hours previous, Darrow had arisen with the remark before chronicled, Jack Warford had followed him in the expectation of a long expedition. To the young man's surprise it lasted just to the hall. There Darrow stopped before the blank door of an apparently unused office. Into the lock of this he cautiously fitted a key, manipulated it for a moment, and turned to Jack with an air of satisfaction.

"You have your gun with you?" he asked.

Jack patted his outside pocket.

"Very well, now listen here: I am going to leave the key in the lock. If you hear me whistle sharply, get in as quickly as you know how, and get to shooting. Shoot to kill. If it happens to be dark and you can not make us out, shoot both. Take no chances. On your quickness and your accuracy may depend the lives of the whole city. Do you understand?"

"I understand," said Jack steadily. "Are you sure you can make yourself heard above all this row?"

Darrow nodded, and slipped inside the door.

He found the office chamber unlighted save by the subdued illumination that came in around the drawn shades of the window. Against the dimness he could just make out the gleaming of batteries in rows. An ordinary deal table supported a wireless sender. A figure stood before the darkened window, the figure of a little, old, bent man facing as though looking out. Through the closed cas.e.m.e.nt the roar of the panic-stricken city sounded like a flood. The old man was in the att.i.tude of one looking out intently. Once he raised both arms, the fists clenched, high above his head.

Darrow stole forward as quietly as he could. When he was about half-way across the room the old man turned and saw him. For the briefest instant he stared at the intruder; then, with remarkable agility, cast himself toward the table on which stood the wireless sender. Darrow, too, sprang forward. They met across the table. Darrow clutched the old man's wrists.

Immediately began a desperate and silent trial of strength. The old man developed an unexpected power. The table lay between them, prohibiting a closer grip. Inch by inch, impelled by the man's iron will, his hand forced his way toward the sending key. Darrow put forth all his strength to prevent. There was no violent struggle, no noise; simply the pressure of opposing forces. Gradually the scientist's youth prevailed against the older man's desperation. The hand creeping toward the sender came to a stop. Then, all at once, the older man's resistance collapsed entirely.

Darrow swept his arm back, stepped around the table, and drew his opponent, almost unresisting, back to the window.

"Jack!" he called.

At the sound of his voice the old man gathered his last vitality in a tremendous effort to jerk loose from his captor. Catching Darrow unawares, he almost succeeded in getting free. The flash was too brief. He managed only to rap the young man's head rather sharply against a shade-fitting of the window.

The outer door jerked open, and Jack Warford leaped into the room, revolver in hand. Darrow called an instant warning.

"All right!" he shouted. "Turn on the light, next to you somewhere. Shut the door."

These orders were obeyed. The electric flared. By its light the office was seen to be quite empty save for a cabinet full of books and papers; rows and rows of battery jars; the receiving and sending apparatus of a wireless outfit; the deal table, and one wooden chair. Darrow looked around keenly.

"That's all right, Jack," said he. "Just get around here cautiously and raise the window shade. Look out you don't get near that table. That's it.

Now just help me get this man a little away from the table! Good! Now, tie him up. No, bring over the chair. Tie him in that chair. Gently. That's all right. Whew!"

"You're hurt," said Jack.

Darrow touched his forehead.

"A b.u.mp," he said briefly. "Well, Jack, my son, we've done it!"

"You don't mean to say--" cried Jack.

Darrow nodded.

"Now, my friend," he addressed the huddled figure in the chair, "the game is up. You are caught, and you must realize it." He surveyed the captive thoughtfully. "Tell me, who are you?" he added. "I should know you, for you are a great discoverer."

The old man stared straight at his interlocutor with his expressionless eyes, behind which no soul, no mind, no vitality even seemed to lie.