Brande. My reflections on this identity of interest were interrupted by the man himself. After a word of welcome he said:

"Let me show you our great experiment; that which touches the high-water mark of scientific achievement in the history of humanity. It is not much in itself, but it is the pioneer of many marvels."

He brought me to a metal stand, on which a small instrument constructed of some white metal was placed. A large number of wires were connected with various portions of it, and these wires passed into the side-wall of the building.

In appearance, this marvel of micrology, so far as the eye-piece and upper portions went, was like an ordinary microscope, but its magnifying power was to me unbelievable. It magnified the object under examination many thousand times more than the most powerful microscope in the world.

I looked through the upper lens, and saw a small globe suspended in the middle of a tiny chamber filled with soft blue light, or transparent material. Circling round this globe four other spheres revolved in orbits, some almost circular, some elliptical, some parabolic. As I looked, Brande touched a key, and the little globules began to fly more rapidly round their primary, and make wider sweeps in their revolutions. Another key was pressed, and the revolving spheres slowed down and drew closer until I could scarcely distinguish any movement. The globules seemed to form a solid ball.

"Attend now!" Brande exclaimed.

He tapped the first key sharply. A little grey cloud obscured the blue light. When it cleared away, the revolving globes had disappeared.

"What do you think of it?" he asked carelessly.

"What is it? What does it mean? Is it the solar system or some other system illustrated in miniature? I am sorry for the misadventure."

"You are partly correct," Brande replied. "It is an illustration of a planetary system, though a small one. But there was no misadventure. I caused the somewhat dangerous result you witnessed, the wreckage not merely of the molecule of marsh gas you were examining—which any educated chemist might do as easily as I—but the wreckage of its constituent atoms. This is a scientific victory which dwarfs the work of Helmholtz, Avogadro, or Mendelejeff. The immortal Dalton himself" (the word "immortal" was spoken with a sneer) "might rise from his grave to witness it."

"Atoms—molecules! What are you talking about?" I asked, bewildered.

"You were looking on at the death of a molecule—a molecule of marsh gas, as I have already said. It was caused by a process which I would describe to you if I could reduce my own life work—and that of every scientific amateur who has preceded me since the world began—into half a dozen sentences. As that would be difficult, I must ask you to accept my personal assurance that you witnessed a fact, not a fiction of my imagination."

"And your instrument is so perfect that it not only renders molecules and atoms but their diffusion visible? It is a microscopic impossibility. At least it is amazing."

"Pshaw!" Brande exclaimed impatiently. "My instrument does certainly magnify to a marvellous extent, but not by the old device of the simple microscope, which merely focussed a large area of light rays into a small one. So crude a process could never show an atom to the human eye. I add much to that. I restore to the rays themselves the luminosity which they lost in their passage through our atmosphere. I give them back all their visual properties, and turn them with their full etheric blaze on the object under examination. Great as that achievement is, I deny that it is amazing. It may amaze a Papuan to see his eyelash magnified to the size of a wire, or an uneducated Englishman to see a cheese-mite magnified to the size of a midge. It should not amaze you to see a simple process a little further developed."

"Where does the danger you spoke of come in?" I asked with a pretence of interest. Candidly, I did not believe a single word that Brande had said.

"If you will consult a common text-book on the physics of the ether," he replied, "you will find that one grain of matter contains sufficient energy, if etherised, to raise a hundred thousand tons nearly two miles. In face of such potentiality it is not wise to wreck incautiously even the atoms of a molecule."

"And the limits to this description of scientific experiment? Where are they?"

"There are no limits," Brande said decisively. "No man can say to science 'thus far and no farther.' No man ever has been able to do so. No man ever shall!"

CHAPTER III.
"IT IS GOOD TO BE ALIVE."

Amongst the letters lying on my breakfast-table a few days after the meeting was one addressed in an unfamiliar hand. The writing was bold, and formed like a man's. There was a faint trace of a perfume about the envelope which I remembered. I opened it first.

It was, as I expected, from Miss Brande. Her brother had gone to their country place on the southern coast. She and her friend, Edith Metford, were going that day. Their luggage was already at the station. Would I send on what I required for a short visit, and meet them at eleven o'clock on the bridge over the Serpentine? It was enough for me. I packed a large portmanteau hastily, sent it to Charing Cross, and spent the time at my disposal in the park, which was close to my hotel.

Although the invitation I had received gave me pleasure, I could not altogether remove from my mind a vague sense of disquietude concerning Herbert Brande and his Society. The advanced opinions I had heard, if extreme, were not altogether alarming. But the mysterious way in which Brande himself had spoken about the Society, and the still more mysterious air which some of the members assumed when directly questioned as to its object, suggested much. Might it not be a revolutionary party engaged in a grave intrigue—a branch of some foreign body whose purpose was so dangerous that ordinary disguises were not considered sufficiently secure? Might they not have adopted the jargon and pretended to the opinions of scientific faddists as a cloak for designs more sinister and sincere? The experiment I witnessed might be almost a miracle or merely a trick. Thinking it over thus, I could come to no final opinion, and when I asked myself aloud, "What are you afraid of?" I could not answer my own question. But I thought I would defer joining the Society pending further information.

A few minutes before eleven, I walked towards the bridge over the Serpentine. No ladies appeared to be on it. There were only a couple of smartly dressed youths there, one smoking a cigarette. I sauntered about until one of the lads, the one who was not smoking, looked up and beckoned to me. I approached leisurely, for it struck me that the boy would have shown better breeding if he had come toward me, considering my seniority.

"I am sorry I did not notice you sooner. Why did you not come on when you saw us?" the smallest and slimmest youth called to me.

"In the name of—Miss—Miss—" I stammered.

"Brande; you haven't forgotten my name, I hope," Natalie Brande said coolly. "This is my friend, Edith Metford. Metford, this is Arthur Marcel."

"How do you do, Marcel? I am glad to meet you; I have heard 'favourable mention' of you from the Brandes," the second figure in knickerbockers said pleasantly.

"How do you do, sir—madam—I mean—Miss—" I blundered, and then in despair I asked Miss Brande, "Is this a tableau vivant? What is the meaning of these disguises?" My