"Brent's lying," exclaimed Paul. "That marriage to me must take place to-morrow."

Talking angrily, sometimes in agreement, at others far apart, the two left the room.

Back in the dining-room by this time Brent had rejoined Flint and now watched him eagerly as he took the last wrappings from the package which he had carried so carefully.

As the last wrapping was stripped from it, on the table before them lay a small steel model, perhaps three feet high--a weird-looking thing in the miniature shape of a man, designed along lines that only a cubist could have conceived--jointed, mobile, truly a contrivance at which to marvel.

Brent gazed incredulously at the strange thing. "An automaton!" he exclaimed.

"More than that," replied Flint, calmly.

Flint unrolled a chart of the human nervous system and spread it out on the table. Pointing to the brain, he leaned over tensely, and whispered:

"This model is merely a piece of mechanism. But the real automaton possesses a human brain which has been transplanted into it and made to guide it."

For a moment Brent listened incredulously, then sat back in his chair and laughed skeptically. But even Flint recognized that there was a hollowness in the laughter.

"Do you mean to tell me," demanded Brent, "that a human brain has been made to control a thing of no use except as a terrible engine of destruction?"

"Not only possible," reiterated Flint, "but it is true."

"Oh, Flint," rallied Brent, with a sort of uneasiness, "you can't tell _me_ that!"

"Believe it or not," insisted the adventurer, "I have been in Madagascar and I know."

For a moment Brent paused at the vehemence of Flint's answer. What had Flint to gain by misrepresentation? A thousand images of the past flitted through Brent's brain. Then slowly a look of terror came over Brent's face. Suppose it were indeed true--this Frankenstein, this conscienceless inhuman superman? Brent gripped himself and composed his features and his voice.

"But this thing," he rasped. "What does this prove?"

"Oh, this is merely automatic--a piece of mechanism--a model which I stole. It works when it is wound up--not like the real one. Look."

Flint put a pencil in the little steel hand of the model and pressed a lever as he held a piece of paper under the pencil. Brent leaned over, fascinated.

Instantly the tiny hand began to trace on the paper one letter--the simple letter "Q."

As the hand finished the tail of the "Q" Brent gripped the table for support. His eyes bulged and stared wildly.

"My God!" burst from his lips. "It is the warning--Q!"

For minutes Brent strove to regain his composure.

Nor was Flint less impressed than the man before him.

What would have been the emotions of both if they had been able to penetrate with the eye through the rocky cliffs on which the stately mansion of Brent Rock stood would have been hard to say.

For, down in a rock-hewn cavern, not many hundred yards away and below them, reached by a secret entrance from the shrubbery of the cliffs near the shore, already had congregated several rough characters. They were playing cards and drinking, now and then glancing furtively at the passage entrance, as though they were expecting the arrival of some one or something.

Suddenly came a dull metallic clank through the passage, strangely echoing. At once all leaped to their feet, at attention, not unmixed with awe and fear that sat strangely on their desperate features. What was it that they, who feared neither God nor man, feared?

They strained their eyes, looking into the passage that led darkly away into blackness.

Dimly down it now could be seen two gleaming spots of light, points in the Cimmerian darkness. They seemed to be growing larger and coming nearer as with each hollow reverberation the dull metallic thuds increased.

Faintly now could be made out in the blackness a huge, stalking figure, having the shape of a man, with gigantic, powerful shoulders, powerful arms, a thick body, hips, and thighs that spelled terrific strength, legs and feet that suggested irresistible force.

"The Automaton!" escaped involuntarily from all lips.

Slowly, irresistibly, the horrendous figure stalked forth into the dim light. There it paused for a moment--a figure of steel, larger than most men, yet not so large but that it might have incased a man. And yet its motions, its every action, were like nothing mortal. Even these hardened denizens of the underworld shuddered.

In its hand the Automaton carried a five-branched candlestick, for what purpose none seemed to know. Yet all bowed and quaked at every pantomime motion of the figure, ready to do the bidding of the least motion of their inhuman master.

Still holding the candlestick with its five huge yellow candles before him, the Automaton stalked forward to the table and impressively deposited the candlestick on it, then stepped back a pace and waved his ponderous hand at the assembled emissaries, who scarcely repressed their own abject terror.

CHAPTER IV

At a motion from the Automaton a dark-skinned Madagascan stepped forward and lighted the five candles. At once a dense smoke began drifting from the candles.

The men looked at one another, showing an uncomfortable fear of what the negro and the Automaton were doing. Even the negro edged away fearfully and all crouched back, afraid of the fumes.

A moment later the Automaton, with a mighty blast of air, snuffed all the candles at once, then, without a word, picked up the candlestick and stalked off through the passage on the opposite side of the den from the entrance, the passage that led to the Graveyard of Genius.

A few moments later the secret rock door from this passage into the Graveyard swung open and the Automaton stalked in, going carefully, noiselessly, now. Across the floor he walked to the steel door, which he swung open, then on out into the cellar of Brent Rock and up the steps to the door under the stairs that led to the hallway of the great house.

In the hall the Automaton halted beside a small stand on which stood a candlestick exactly like the one he carried. Quickly he picked up the original candlestick and replaced it by the one he carried. Then he set the original back of the portieres, and with a glance at the library door turned back to the cellar, closing the door noiselessly behind him.

Down the steps he went, toward the open door of the Graveyard of Genius.

Beside the door was the fuse-box of the lighting system of the house.

The Automaton reached out and began rubbing sharply at the insulation of the feed wires.

Up-stairs, in the dining-room, Brent had by this time flung off his coat and was examining with Flint the curious model the adventurer had brought from Madagascar. Brent was very excited and questioned Flint eagerly.

"I tell you, Flint," cried Brent, at length, huskily, as he seized a pen and dipped in into the ink, "the time has come for me to do what I have long intended. I am going to do now what I should have done years ago."

Brent started to write feverishly:

QUENTIN LOCKE,--I have done you a great injury about which you know nothing, but I am willing to--

His hand had scarcely traced the last word when the room was plunged into absolute darkness.

Down in the cellar the Automaton had succeeded in rubbing off the insulation of the feed wires. There was a flash of light as he laid his steel hand over the two feed wires--then darkness.

In the dining-room Brent and Flint, already keyed to the highest pitch, leaped to their feet with an exclamation of terror.

Late as it was, Locke was working in his laboratory on the second floor of the house when the lights winked out. Surprised for the moment, he ran out into the hall.