Stuart found himself holding his breath as he awaited a reply--for he knew that he was on the verge of learning that which poor Gaston Max had given his life to learn. A moment Fo-Hi hesitated--and in that moment his captive recognised, and shuddered to recognise, that he won this secret too late. Then:

"The Grand Duke is a tactician who, had he remained in Europe, might well have readjusted the frontiers of his country. Van Rembold, as a mining engineer, stands alone, as does Henrik Ericksen in the electrical world. As for Sir Frank Narcombe, he is beyond doubt the most brilliant surgeon of today, and I, a judge of men, count you his peer in the realm of pure therapeutics. Whilst your studies in snake-poisons (which were narrowly watched for us in India) give you an unique place in toxicology. These great men will be some of your companions in China."

"In China!"

"In China, Dr. Stuart, where I hope you will join them. You misapprehend the purpose of my mission. It is not destructive, although neither I nor my enlightened predecessor have ever scrupled to remove any obstacle from the path of that world-change which no human power can check or hinder; it is primarily constructive. No state or group of states can hope to resist the progress of a movement guided and upheld by a monopoly of the world's genius. The Sublime Order, of which I am an unworthy member, stands for such a movement."

"Rest a.s.sured it will be crushed."

"Van Rembold is preparing radium in quant.i.ties. .h.i.therto unknown from the vast pitchblend deposits of Ho-Nan--which industry we control. He visited China arrayed in his shroud, and he travelled in a handsome Egyptian sarcophagus purchased at Sotherby's on behalf of a Chinese collector."

Fo-Hi stood up and crossed to the hissing furnace. He busied himself with some obscure experiment which proceeded there, and:

"Your own state-room will be less romantic, Dr. Stuart," he said, speaking without turning his head; "possibly a packing-case. In brief, that intellectual giant who achieved to much for the Sublime Order--my immediate predecessor in office--devised a means of inducing artificial catalepsy----"

"My G.o.d!" muttered Stuart, as the incredible, the appalling truth burst upon his mind.

"My own rather hazardous delay," continued Fo-Hi, "is occasioned in some measure by my anxiety to complete the present experiment. Its product will be your pa.s.sport to China."

Carrying a tiny crucible, he returned to the table.

Stuart felt that his self-possession was deserting him. Madness threatened ... If he was not already mad. He forced himself to speak.

"You taunt me because I am helpless. I do not believe that those men have been spirited into China. Even if it were so, they would die, as I would die, rather than prost.i.tute their talents to such mad infamy."

Fo-Hi carefully poured the contents of the crucible into a flat platinum pan.

"In China, Dr. Stuart," he said, "we know how to _make_ men work! I myself am the deviser of a variant of the unduly notorious _kite_ device and the scarcely less celebrated 'Six Gates of Wisdom.' I term it The Feast of a Thousand Ants. It is performed with the aid of African driver ant, a pair of surgical scissors and a pot of honey.

I have observed you studying with interest the human skeleton yonder.

It is that of one of my followers--a Nubian mute--who met with an untimely end quite recently. You are wondering, no doubt, how I obtained the frame in so short a time? My African driver ants, Dr.

Stuart, of which I have three large cases in a cellar below this room, performed the task for me in exactly sixty-nine minutes."

Stuart strained frenziedly at his gyves.

"My G.o.d!" he groaned. "All I have heard of you was the merest flattery. You are either a fiend or a madman!"

"When you are enlisted as a member of the Sublime Order," said Fo-Hi softly, "and you awaken in China, Dr. Stuart--you will work. We have no unwilling recruits."

"Stop your accursed talk. I have heard enough."

But the metallic voice continued smoothly:

"I appreciate the difficulty which you must experience in grasping the true significance of this movement. You have seen mighty nations, armed with every known resource of science, at a deadlock on the battlefield. You naturally fail to perceive how a group of Oriental philosophers can achieve what the might of Europe failed to achieve.

You will remember, in favour of my claims, that we command the service of the world's genius, and have a financial backing which could settle the national loans of the world! In other words, exhumation of a large percentage of the great men who have died in recent years would be impossible. Their tombs are empty."

"I have heard enough. Drug me, kill me; but spare me your confidences."

"In the crowded foyer of a hotel," continued Fo-Hi imperturbably, "of a theatre, of a concert-room; in the privacy of their home, of their office; wherever opportunity offered, I caused them to be touched with the point of a hypodermic needle such as this." He held up a small hypodermic syringe.

"It contained a minute quant.i.ty of the serum which I am now preparing--the serum whose discovery was the crowning achievement of a great scientist's career (I refer, Dr. Stuart, to my brilliant predecessor). They were buried alive; but no surgeon in Europe or America would have hesitated to certify them dead. Aided by a group of six Hindu fanatics, trained as _Lughais_ (grave-diggers), it was easy to gain access to their resting-places. One had the misfortune to be cremated by his family--a great loss to my Council. But the others are now in China, at our headquarters. They are labouring day and night to bring this war-scarred world under the sceptre of an Eastern Emperor."

"Faugh!" cried Stuart. "The whole of that war-scarred world will stand armed before you!"

"We realise that, doctor; therefore we are prepared for it. We spoke of the Norwegian Henrick Ericksen. This is his most recent contribution to our armament."

Fo-Hi rested on long yellow hand upon a kind of model searchlight.

"I nearly committed the clumsy indiscretion of removing you with this little instrument," he said. "You recall the episode? Ericksen's Disintegrating Ray, Dr. Stuart. The model, here, possesses a limited range, of course, but the actual instrument has a compa.s.s of seven and a half miles. It can readily be carried by a heavy plane! One such plane in a flight from Suez to Port Said, could destroy all the shipping in the Ca.n.a.l and explode every grain of ammunition on either sh.o.r.e! Since I must leave England to-night, the model must be destroyed, and unfortunately a good collection of bacilli has already suffered the same fate."

Placidly, slowly, and unmoved from his habit of unruffled dignity, Fo-Hi placed the model in a deep mortar, whilst Stuart watched him speechless and aghast. He poured the contents of a large pan into the mortar, whereupon a loud hissing sound broke the awesome silence of the room and a cloud of fumes arose.

"Not a trace, doctor!" said the cowled man. "A little preparation of my own. It destroys the hardest known substance--with the solitary exception of a certain clay--in the same way that nitric acid would destroy tissue paper. You see I might have aspired to become famous among safe-breakers."

"You have preferred to become infamous among murderers!" snapped Stuart.

"To murder, Dr. Stuart, I have never stooped. I am a specialist in selective warfare. When you visit the laboratory of our chief chemist in Kiangsu you will be shown the whole of the armory of the Sublime Order. I regret that the activities of your zealous and painfully inquisitive friend, M. Gaston Max, have forced me to depart from England before I had completed my work here."

"I pray you may never depart," murmured Stuart.

Fo-Hi having added some bright green fluid to that in the flat pan, had now poured the whole into a large test-tube, and was holding it in the flame of the burner. At the moment that it reached the boiling point it became colourless. He carefully placed the whole of the liquid in a retort to which he attached a condensor. He stood up.

Crossing to a gla.s.s case which rested upon a table near the _diwan_ he struck it lightly with his hand. The case contained sand and fragments of rock, but as Fo-Hi struck it, out from beneath the pieces of rock darted black active creatures.

"The common black scorpion of Southern India," he said softly. "Its venom is the basis of the priceless formula, _F. Katalepsis,_ upon which the structure of our Sublime Order rests, Dr. Stuart; hence the adoption of a scorpion as our device."

He took up a long slender flask.

"This virus prepared from a glandular secretion of the Chinese swamp-adder is also beyond price. Again-the case upon the pedestal yonder contains five perfect bulbs, three already in flower, as you observe, of an orchid discovered by our chief chemist in certain forests of Burma. It only occurs at extremely rare intervals--eighty years or more--and under highly special conditions. If the other two bulbs flower, I shall be enabled to obtain from the blooms a minimum quant.i.ty of an essential oil for which the nations of the earth, if they knew its properties, would gladly empty their treasuries. This case must at all costs accompany me."

"Yet because you are still in England," said Stuart huskily, "I venture to hope that your devil dreams may end on the scaffold."

"That can never be, Dr. Stuart," returned Fo-Hi placidly. "The scaffold is not for such as I. Moreover, it is a crude and barbaric inst.i.tution which I deplore. Do you see that somewhat peculiarly constructed chair, yonder? It is an adaptation, by a brilliant young chemist of Canton, of Ericksen's Disintegrating Ray. A bell hangs beside it. If you were seated in that chair and I desire to dismiss you, it would merely be necessary fro me to strike the bell once with the hammer. Before the vibration of the note had become inaudible you would be seeking your ancestors among the shades. It is the throne of the G.o.ds. Such a death is poetic."

He returned to the table and, observing meticulous care, emptied the few drops of colourless liquid from the condenser into a test-tube.

Holding the tube near a lamp, he examined the contents, then poured the liquid into the curious yellow bottle. A faint vapour arose from it.

"You would scarcely suppose," he said, "that yonder window opens upon an ivy-grown balcony commanding an excellent view of that picturesque Tudor survival, Hampton Court? I apprehend, however, that the researches of your late friend, M. Gaston Max, may ere long lead Scotland Yard to my doors, although there has been nothing in the outward seeming of this house, in the circ.u.mstances of my tenancy, or in my behaviour since I have--secretly--resided here, to excite local suspicion."

"Scotland Yard men may surround the house now!" said Stuart viciously.

"One of the two followers I have retained here with me, watches at the gate," replied Fo-Hi. "An intruder seeking to enter by any other route, through the hedge, over the wall, or from the river, would cause electric bells to ring loudly in this room, the note of the bell signifying the point of entry. Finally, in the event of such a surprise, I have an exit whereby one emerges at a secret spot on the river bank. A motor-boat, suitably concealed, awaits me there."

He placed a thermometer in the neck of the yellow bottle and the bottle in a rack. He directed the intolerable gaze of his awful eyes upon the man who sat, teeth tightly clenched, watching him from the _diwan._

"Ten minutes of life--in England--yet remain to you, Dr. Stuart. In ten minutes this fluid will have cooled to a temperature of 99 degrees, when I shall be enabled safely make an injection. You will be reborn in Kiangsu."

Fo-Hi walked slowly to the door whereby he had entered, opened it and went out. The door closed.