'If you saw what was under that tarpaulin you would be even less sure,' said the engineer. 'All this lower rock cut like cheese, and when we were through it we came on a new formation like nothing on earth. "Cover it up! Don't touch it!" said the Professor. So we tarpaulined it according to his instructions, and there it lies.

'Could we not have a look?'

A frightened expression came over the engineer's lugubrious countenance.

'It's no joke disobeying the Professor,' said he. 'He is so damn cunning, too, that you never know what check he has set on you. However, we'll have a peep and chance it.'

He turned down our reflector lamp so that the light gleamed upon the black tarpaulin. Then he stooped and, seizing a rope which connected up with the corner of the covering, he disclosed half-a-dozen square yards of the surface beneath it.

It was a most extraordinary and terrifying sight. The floor consisted of some greyish material, glazed and shiny, which rose and fell in slow palpitation. The throbs were not direct, but gave the impression of a gentle ripple or rhythm, which ran across the surface. This surface itself was not entirely homogeneous, but beneath it, seen as through ground glass, there were dim whitish patches or vacuoles, which varied constantly in shape and size. We stood all three gazing spell-bound at this extraordinary sight.

'Does look rather like a skinned animal,' said Malone, in an awed whisper. 'The old man may not be so far out with his blessed echinus.'

'Good Lord!' I cried. 'And am I to plunge a harpoon into that beast!'

'That's your privilege, my son,' said Malone, 'and, sad to relate, unless I give it a miss in baulk, I shall have to be at your side when you do it.'

'Well, I won't,' said the head engineer, with decision.

'I was never clearer on anything than I am on that. If the old man insists, then I resign my portfolio. Good Lord, look at that!'

The grey surface gave a sudden heave upwards, welling towards us as a wave does when you look down from the bulwarks. Then it subsided and the dim beatings and throbbings continued as before. Barforth lowered the rope and replaced the tarpaulin.

'Seemed almost as if it knew we were here,' said he.

'Why should it swell up towards us like that? I expect the light had some sort of effect upon it.'

'What am I expected to do now?' I asked. Mr. Barforth pointed to two beams which lay across the pit just under the stopping place of the lift. There was an interval of about nine inches between them.

'That was the old man's idea,' said he. 'I think I could have fixed it better, but you might as well try to argue with a mad buffalo. It is easier and safer just to do whatever he says. His idea is that you should use your six-inch bore and fasten it in some way between these supports. '

'Well, I don't think there would be much difficulty about that,' I answered. 'I'll take the job over as from today.'

It was, as one might imagine, the strangest experience of my very varied life which has included well-sinking in every continent upon earth. As Professor Challenger was so insistent that the operation should be started from a distance, and as I began to see a good deal of sense in his contention, I had to plan some method of electric control, which was easy enough as the pit was wired from top to bottom. With infinite care my foreman, Peters, and I brought down our lengths of tubing and stacked them on the rocky ledge. Then we raised the stage of the lowest lift so as to give ourselves room. As we proposed to use the percussion system, for it would not do to trust entirely to gravity, we hung our hundred-pound weight over a pulley beneath the lift, and ran our tubes down beneath it with a V-shaped terminal. Finally, the rope which held the weight was secured to the side of the shaft in such a way that an electrical discharge would release it. It was delicate and difficult work done in a more than tropical heat, and with the ever-present feeling that a slip of a foot or the dropping of a tool upon the tarpaulin beneath us might bring about some inconceivable catastrophe. We were awed, too, by our surroundings. Again and again I have seen a strange quiver and shiver pass down the walls, and have even felt a dull throb against my hands as I touched them. Neither Peters nor I were very sorry when we signalled for the last time that we were ready for the surface, and were able to report to Mr. Barforth that Professor Challenger could make his experiment as soon as he chose.

And it was not long that we had to wait. Only three days after my date of completion my notice arrived.

It was an ordinary invitation card such as one uses for 'at homes,' and it ran thus:

PROFESSOR G. E. CHALLENGER,

F.R.S. MD., D.Sc., etc.

(late President Zoological Institute and holder of so many honorary degrees and appointments that they overtax the capacity of this card) requests the attendance of

MR. JONES (no lady)

at 11.30 a.m. of Tuesday, June 21st, to witness a remarkable triumph of mind over matter

at

HENGIST DOWN, SUSSEX.

Special train Victoria 10.5. Passengers pay their own fares. Lunch after the experiment or not – according to circumstances. Station, Storrington.

R.S.V.P. (and at once with name in block letters), 14 (Bis), Enmore Gardens, S.W.

I found that Malone had just received a similar missive over which he was chuckling.

'It is mere swank sending it to us,' said he. 'We have to be there whatever happens, as the hangman said to the murderer. But I tell you this has set all London buzzing. The old man is where he likes to be, with a pin-point limelight right on his hairy old head.'

And so at last the great day came. Personally I thought it well to go down the night before so as to be sure that everything was in order. Our borer was fixed in position, the weight was adjusted, the electric contacts could be easily switched on, and I was satisfied that my own part in this strange experiment would be carried out without a hitch. The electric controls were operated at a point some five hundred yards from the mouth of the shaft, to minimize any personal danger. When on the fateful morning, an ideal English summer day, I came to the surface with my mind assured, I climbed half-way up the slope of the Down in order to have a general view of the proceedings.

All the world seemed to be coming to Hengist Down. As far as we could see the roads were dotted with people. Motor-cars came bumping and swaying down the lanes, and discharged their passengers at the gate of the compound. This was in most cases the end of their progress. A powerful band of janitors waited at the entrance, and no promises or bribes, but only the production of the coveted buff tickets, could get them any farther. They dispersed therefore and joined the vast crowd which was already assembling on the side of the hill and covering the ridge with a dense mass of spectators. The place was like Epsom Downs on the Derby Day. Inside the compound certain areas had been wired-off, and the various privileged people were conducted to the particular pen to which they had been allotted. There was one for peers, one for members of the House of Commons, and one for the heads of learned societies and the men of fame in the scientific world, including Le Pellier of the Sorbonne and Dr. Driesinger of the Berlin Academy. A special reserved enclosure with sandbags and a corrugated iron roof was set aside for three members of the Royal Family.

At a quarter past eleven a succession of chars-a-bancs brought up specially-invited guests from the station and I went down into the compound to assist at the reception. Professor Challenger stood by the select enclosure, resplendent in frock-coat, white waistcoat, and burnished top-hat, his expression a blend of overpowering and almost offensive benevolence, mixed with most portentous self-importance. 'Clearly a typical victim of the Jehovah complex,' as one of his critics described him. He assisted in conducting and occasionally in propelling his guests into their proper places, and then, having gathered the elite of the company around him, he took his station upon the top of a convenient hillock and looked around him with the air of the chairman who expects some welcoming applause. As none was forthcoming, he plunged at once into his subject, his voice booming to the farthest extremities of the enclosure.