danger. She was oddly sullen, and throughout the morning her gaze returned again and again half-fascinatedly, half-wonderingly to the neighbouring isle.
“That afternoon the natives returned. And that night on Nan-Tauach the silence was unbroken nor were there lights nor sign of life.
“You will understand, Goodwin, how the occurrences I have related would excite the scientific curiosity. We rejected immediately, of course, any explanation admitting the supernatural.
“Our—symptoms let me call them—could all very easily be accounted for. It is unquestionable that the vibrations created by certain musical instruments have definite and sometimes extraordinary effect upon the nervous system. We accepted this as the explanation of the reactions we had experienced, hearing the unfamiliar sounds. Thora’s nervousness, her superstitious apprehensions, had wrought her up to a condition of semi-somnambulistic hysteria. Science could readily explain her part in the night’s scene.
“We came to the conclusion that there must be a passage-way between Ponape and Nan-Tauach known to the natives—and used by them during their rites. We decided that on the next departure of our labourers we would set forth immediately to Nan-Tauach. We would investigate during the day, and at evening my wife and Thora would go back to camp, leaving Stanton and me to spend the night on the island, observing from some safe hiding-place what might occur.
“The moon waned; appeared crescent in the west; waxed slowly toward the full. Before the men left us they literally prayed us to accompany them. Their importunities only made us more eager to see what it was that, we were now convinced, they wanted to conceal from us. At least that was true of Stanton and myself. It was not true of Edith. She was thoughtful, abstracted—reluctant.
“When the men were out of sight around the turn of the harbour, we took our boat and made straight for Nan-Tauach. Soon its mighty sea-wall towered above us. We passed through the water-gate with its gigantic hewn prisms of basalt and landed beside a half-submerged pier. In front of us stretched a series of giant steps leading into a vast court strewn with fragments of fallen pillars. In the centre of the court, beyond the shattered pillars, rose another terrace of basalt blocks, concealing, I knew, still another enclosure.
“And now, Walter, for the better understanding of what follows—and—and—” he hesitated. “Should you decide later to return with me or, if I am taken, to—to—follow us—listen carefully to my description of this place: Nan-Tauach is literally three rectangles. The first rectangle is the sea-wall, built up of monoliths—hewn and squared, twenty feet wide at the top. To get to the gateway in the sea-wall you pass along the canal marked on the map between Nan-Tauach and the islet named Tau. The entrance to the canal is bidden by dense thickets of mangroves; once through these the way is clear. The steps lead up from the landing of the sea-gate through the entrance to the courtyard.
“This courtyard is surrounded by another basalt wall, rectangular, following with mathematical exactness the march of the outer barricades. The sea-wall is from thirty to forty feet high—originally it must have been much higher, but there has been subsidence in parts. The wall of the first enclosure is fifteen feet across the top and its height varies from twenty to fifty feet—here, too, the gradual sinking of the land has caused portions of it to fall.
“Within this courtyard is the second enclosure. Its terrace, of the same basalt as the outer walls, is about twenty feet high. Entrance is gained to it by many breaches which time has made in its stonework. This is the inner court, the heart of Nan-Tauach! There lies the great central vault with which is associated the one name of living being that has come to us out of the mists of the past. The natives say it was the treasure-house of Chau-te-leur, a mighty king who reigned long ‘before their fathers.’ As Chan is the ancient Ponapean word both for sun and king, the name means, without doubt, ‘place of the sun king.’ It is a memory of a dynastic name of the race that ruled the Pacific continent, now vanished—just as the rulers of ancient Crete took the name of Minos and the rulers of Egypt the name of Pharaoh.
“And opposite this place of the sun king is the moon rock that hides the Moon Pool.
“It was Stanton who discovered the moon rock. We had been inspecting the inner courtyard; Edith and Thora were getting together our lunch. I came out of the vault of Chau-te-leur to find Stanton before a part of the terrace studying it wonderingly.
“‘What do you make of this?’ he asked me as I came up. He pointed to the wall. I followed his finger and saw a slab of stone about fifteen feet high and ten wide. At first all I noticed was the exquisite nicety with which its edges joined the blocks about it. Then I realized that its colour was subtly different—tinged with grey and of a smooth, peculiar—deadness.
“‘Looks more like calcite than basalt,’ I said. I touched it and withdrew my hand quickly for at the contact every nerve in my arm tingled as though a shock of frozen electricity had passed through it. It was not cold as we know cold. It was a chill force—the phrase I have used—frozen electricity—describes it better than anything else. Stanton looked at me oddly.
“‘So you felt it too,’ he said. ‘I was wondering whether I was developing hallucinations like Thora. Notice, by the way, that the blocks beside it are quite warm beneath the sun.’
“We examined the slab eagerly. Its edges were cut as though by an engraver of jewels. They fitted against the neighbouring blocks in almost a hair-line. Its base was slightly curved, and fitted as closely as top and sides upon the huge stones on which it rested. And then we noted that these stones had been hollowed to follow the line of the grey stone’s foot. There was a semicircular depression running from one side of the slab to the other. It was as though the grey rock stood in the centre of a shallow cup—revealing half, covering half. Something about this hollow attracted me. I reached down and felt it. Goodwin, although the balance of the stones that formed it, like all the stones of the courtyard, were rough and age-worn—this was as smooth, as even surfaced as though it had just left the hands of the polisher.
“‘It’s a door!’ exclaimed Stanton. ‘It swings around in that little cup. That’s what makes the hollow so smooth.’
“‘Maybe you’re right,’ I replied. ‘But how the devil can we open it?’
“We went over the slab again—pressing upon its edges, thrusting against its sides. During one of those efforts I happened to look up—and cried out. A foot above and on each side of the corner of the grey rock’s lintel was a slight convexity, visible only from the angle at which my gaze struck it.
“We carried with us a small scaling-ladder and up this I went. The bosses were apparently nothing more than chiseled curvatures in the stone. I laid my hand on the one I was examining, and drew it back sharply. In my palm, at the base of my thumb, I had felt the same shock that I had in touching the slab below. I put my hand back. The impression came from a spot not more than an inch wide. I went carefully over the entire convexity, and six times more the chill ran through my arm. There were seven circles an inch wide in the curved place, each of which communicated the precise sensation I have described. The convexity on the opposite side of the slab gave exactly the same results. But no amount of touching or of pressing these spots singly or in any combination gave the slightest promise of motion to the slab itself.
“‘And yet—they’re what open it,’ said Stanton positively.
“‘Why do you say that?’ I asked.
“‘I—don’t know,’ he answered hesitatingly. ‘But something tells me so. Throck,’ he went on half earnestly, half laughingly, ‘the purely scientific part of me is fighting the purely human part of me. The scientific part is urging me to find some way to get that slab either down or open. The human part is just as strongly urging me to do nothing of the sort and get away while I can!’
“He laughed again—shamefacedly.
“‘Which shall it be?’ he asked—and I thought that in his tone the human side of him was ascendant.
“‘It will probably stay as it is—unless we blow it to bits,’ I said.
“‘I