Personal danger would never have moved Challenger, but the idea that his scientific work might remain unfinished hit him hard. He hesitated, and before he could make up his mind I had dashed forward and jumped into the chair. I saw the inventor put his hand to the handle. I was aware of a click. Then for a moment there was a sensation of confusion and a mist before my eyes. When they cleared, the inventor with his odious smile was standing before me, and Challenger, with his apple-red cheeks drained of blood and colour, was staring over his shoulder.

'Well, get on with it!' said I.

'It is all over. You responded admirably,' Nemor replied. 'Step out, and Professor Challenger will now, no doubt, be ready to take his turn.'

I have never seen my old friend so utterly upset. His iron nerve had for a moment completely failed him. He grasped my arm with a shaking hand.

'My God, Malone, it is true,' said he. 'You vanished. There is not a doubt of it. There was a mist for an instant and then vacancy.'

'How long was I away?'

'Two or three minutes. I was, I confess, horrified. I could not imagine that you would return. Then he clicked this lever, if it is a lever, into a new slot and there you were upon the chair, looking a little bewildered but otherwise the same as ever. I thanked God at the sight of you!' He mopped his moist brow with his big red handkerchief.

'Now, sir,' said the inventor. 'Or perhaps your nerve has failed you?'

Challenger visibly braced himself. Then, pushing my protesting hand to one side, he seated himself upon the chair. The handle clicked into number three. He was gone.

I should have been horrified but for the perfect coolness of the operator. 'It is an interesting process, is it not?' he remarked. 'When one considers the tremendous individuality of the Professor it is strange to think that he is at present a molecular cloud suspended in some portion of this building. He is now, of course, entirely at my mercy. If I choose to leave him in suspension there is nothing on earth to prevent me.'

'I would very soon find means to prevent you.'

The smile once again became a snarl. 'You cannot imagine that such a thought ever entered my mind. Good heavens! Think of the permanent dissolution of the great Professor Challenger vanished into cosmic space and left no trace! Terrible! Terrible! At the same time he has not been as courteous as he might. Don't you think some small lesson – ?'

'No, I do not.'

'Well, we will call it a curious demonstration. Something that would make an interesting paragraph in your paper. For example, I have discovered that the hair of the body being on an entirely different vibration to the living organic tissues can be included or excluded at will. It would interest me to see the bear without his bristles. Behold him!'

There was the click of the lever. An instant later Challenger was seated upon the chair once more. But what a Challenger! What a shorn lion! Furious as I was at the trick that had been played upon him I could hardly keep from roaring with laughter.

His huge head was as bald as a baby's and his chin was as smooth as a girl's. Bereft of his glorious mane the lower part of his face was heavily jowled and ham-shaped, while his whole appearance was that of an old fighting gladiator, battered and bulging, with the jaws of a bulldog over a massive chin.

It may have been some look upon our faces – I have no doubt that the evil grin of my companion had widened at the sight – but, however that may be, Challenger's hand flew up to his head and he became conscious of his condition. The next instant he had sprung out of his chair, seized the inventor by the throat, and had hurled him to the ground. Knowing Challenger's immense strength I was convinced that the man would be killed.

'For God's sake be careful. If you kill him we can never get matters right again!' I cried.

That argument prevailed. Even in his maddest moments Challenger was always open to reason. He sprang up from the floor, dragging the trembling inventor with him. 'I give you five minutes,' he panted in his fury. 'If in five minutes I am not as I was, I will choke the life out of your wretched little body.'

Challenger in a fury was not a safe person to argue with. The bravest man might shrink from him, and there were no signs that Mr. Nemor was a particularly brave man. On the contrary, those blotches and warts upon his face had suddenly become much more conspicuous as the face behind them changed from the colour of putty, which was normal, to that of a fish's belly. His limbs were shaking and he could hardly articulate.

'Really, Professor!' he babbled, with his hand to his throat, 'this violence is quite unnecessary. Surely a harmless joke may pass among friends. It was my wish to demonstrate the powers of the machine. I had imagined that you wanted a full demonstration. No offence, I assure you. Professor, none in the world!'

For answer Challenger climbed back into the chair.

'You will keep your eye upon him, Malone. Do not permit any liberties.'

'I'll see to it, sir.'

'Now then, set that matter right or take the consequences.'

The terrified inventor approached his machine. The reuniting power was turned on to the full, and in an instant, there was the old lion with his tangled mane once more. He stroked his beard affectionately with his hands and passed them over his cranium to be sure that the restoration was complete. Then he descended solemnly from his perch.

'You have taken a liberty, sir, which might have had very serious consequences to yourself. However, I am content to accept your explanation that you only did it for purposes of demonstration. Now, may I ask you a few direct questions upon this remarkable power which you claim to have discovered?'

'I am ready to answer anything save what the source of the power is. That is my secret.'

'And do you seriously inform us that no one in the world knows this except yourself?'

'No one has the least inkling.'

'No assistants?'

'No, sir. I work alone.'

'Dear me! That is most interesting. You have satisfied me as to the reality of the power, but I do not yet perceive its practical bearings.'

'I have explained, sir, that this is a model. But it would be quite easy to erect a plant upon a large scale. You understand that this acts vertically. Certain currents above you, and certain others below you, set up vibrations which either disintegrate or reunite. But the process could be lateral. If it were so conducted it would have the same effect, and cover a space in proportion to the strength of the current.'

'Give an example.'

'We will suppose that one pole was in one small vessel and one in another; a battleship between them would simply vanish into molecules. So also with a column of troops.'

'And you have sold this secret as a monopoly to a single European Power?'

'Yes, sir, I have. When the money is paid over they shall have such power as no nation ever had yet. You don't even now see the full possibilities if placed in capable hands hands which did not fear to wield the weapon which they held. They are immeasurable.' A gloating smile passed over the man's evil face. 'Conceive a quarter of London in which such machines have been erected. Imagine the effect of such a current upon the scale which could easily be adopted. Why,' he burst into laughter, 'I could imagine the whole Thames valley being swept clean, and not one man, woman, or child left of all these teeming millions!'

The words filled me with horror – and even more the air of exultation with which they were pronounced. They seemed, however, to produce quite a different effect upon my companion. To my surprise he broke into a genial smile and held out his hand to the inventor.

'Well, Mr. Nemor, we have to congratulate you,' said he. 'There is no doubt that you have come upon a remarkable property of nature which you have succeeded in harnessing for the use of man. That this use should be destructive is no doubt very deplorable, but Science knows no distinctions of the sort, but follows knowledge wherever it may lead. Apart from the principle involved you have, I suppose, no objection to my examining the construction of the machine?'