At last, in this hushed green twilight, he saw the crumbling and ineffably ancient facade of the building — a temple, he had no doubt. It was a mass of nauseous bas-reliefs; depicting scenes and beings, objects and ceremonies, which could certainly have no place on this or any sane planet. In hinting of these things Zamacona displays for the first time that shocked and pious hesitancy which impairs the informative value of the rest of his manuscript. We cannot help regretting that the Catholic ardour of Renaissance Spain had so thoroughly permeated his thought and feeling. The door of the place stood wide open, and absolute darkness filled the windowless interior. Conquering the repulsion which the mural sculptures had excited, Zamacona took out flint and steel, lighted a resinous torch, pushed aside curtaining vines, and sallied boldly across the ominous threshold.
For a moment he was quite stupefied by what he saw. It was not the all-covering dust and cobwebs of immemorial aeons, the fluttering winged things, the shriekingly loathsome sculptures on the walls, the bizarre form of the many basins and braziers, the sinister pyramidal altar with the hollow top, or the monstrous, octopus-headed abnormality in some strange, dark metal leering and squatting broodingly on its hieroglyphed pedestal, which robbed him of even the power to give a startled cry. It was nothing so unearthly as this — but merely the fact that, with the exception of the dust, the cobwebs, the winged things, and the gigantic emerald-eyed idol, every particle of substance in sight was composed of pure and evidently solid gold.
Even the manuscript, written in retrospect after Zamacona knew that gold is the most common structural metal of a nether world containing limitless lodes and veins of it, reflects the frenzied excitement which the traveller felt upon suddenly finding the real source of all the Indian legends of golden cities. For a time the power of detailed observation left him, but in the end his faculties were recalled by a peculiar tugging sensation in the pocket of his doublet. Tracing the feeling, he realised that the disc of strange metal he had found in the abandoned road was being attracted strongly by the vast octopus-headed, emerald-eyed idol on the pedestal, which he now saw to be composed of the same unknown exotic metal. He was later to learn that this strange magnetic substance — as alien to the inner world as to the outer world of men — is the one precious metal of the blue-lighted abyss. None knows what it is or where it occurs in Nature, and the amount of it on this planet came down from the stars with the people when great Tulu, the octopus-headed god, brought them for the first time to this earth. Certainly, its only known source was a stock of pre-existing artifacts, including multitudes of Cyclopean idols. It could never be placed or analysed, and even its magnetism was exerted only on its own kind. It was the supreme ceremonial metal of the hidden people, its use being regulated by custom in such a way that its magnetic properties might cause no inconvenience. A very weakly magnetic alloy of it with such base metals as iron, gold, silver, copper, or zinc, had formed the sole monetary standard of the hidden people at one period of their history.
Zamacona’s reflections on the strange idol and its magnetism were disturbed by a tremendous wave of fear as, for the first time in this silent world, he heard a rumble of very definite and obviously approaching sound. There was no mistaking its nature. It was a thunderously charging herd of large animals; and, remembering the Indian’s panic, the footprints, and the moving mass distantly seen, the Spaniard shuddered in terrified anticipation. He did not analyse his position, or the significance of this onrush of great lumbering beings, but merely responded to an elemental urge toward self-protection. Charging herds do not stop to find victims in obscure places, and on the outer earth Zamacona would have felt little or no alarm in such a massive, grove-girt edifice. Some instinct, however, now bred a deep and peculiar terror in his soul; and he looked about frantically for any means of safety.
There being no available refuge in the great, gold-patined interior, he felt that he must close the long-disused door; which still hung on its ancient hinges, doubled back against the inner wall. Soil, vines, and moss had entered the opening from outside, so that he had to dig a path for the great gold portal with his sword; but he managed to perform this work very swiftly under the frightful stimulus of the approaching noise. The hoofbeats had grown still louder and more menacing by the time he began tugging at the heavy door itself; and for a while his fears reached a frantic height, as hope of starting the age-clogged metal grew faint. Then, with a creak, the thing responded to his youthful strength, and a frenzied siege of pulling and pushing ensued. Amidst the roar of unseen stampeding feet success came at last, and the ponderous golden door clanged shut, leaving Zamacona in darkness but for the single lighted torch he had wedged between the pillars of a basin-tripod. There was a latch, and the frightened man blessed his patron saint that it was still effective.