When done with exploration, the adventurer would use the cube and its disc in accomplishing his return — and sometimes the captured mind would be restored safely to its own remote world. Not always, however, was the dominant race so kind. Sometimes, when a potentially important race capable of space travel was found, the worm-like folk would employ the cube to capture and annihilate minds by the thousands, and would extirpate the race for diplomatic reasons — using the exploring minds as agents of destruction.
In other cases sections of the worm-folk would permanently occupy a trans-galactic planet — destroying the captured minds and wiping out the remaining inhabitants preparatory to settling down in unfamiliar bodies. Never, however, could the parent civilization be quite duplicated in such a case; since the new planet would not contain all the materials necessary for the worm-race’s arts. The cubes, for example, could be made only on the home planet.
Only a few of the numberless cubes sent forth ever found a landing and response on an inhabited world — since there was no such thing as aiming them at goals beyond sight or knowledge. Only three, ran the story, had ever landed on peopled worlds in our own particular universe. One of these had struck a planet near the galactic rim two thousand billion years ago, while another had lodged three billion years ago on a world near the centre of the galaxy. The third — and the only one ever known to have invaded the solar system — had reached our own earth 150,000,000 years ago.
It was with this latter that Dr. Winters-Hall’s “translation” chiefly dealt. When the cube struck the earth, he wrote, the ruling terrestrial species was a huge, cone-shaped race surpassing all others before or since in mentality and achievements. This race was so advanced that it had actually sent minds abroad in both space and time to explore the cosmos, hence recognised something of what had happened when the cube fell from the sky and certain individuals had suffered mental change after gazing at it.
Realising that the changed individuals represented invading minds, the race’s leaders had them destroyed — even at the cost of leaving the displaced minds exiled in alien space. They had had experience with even stranger transitions. When, through a mental exploration of space and time, they formed a rough idea of what the cube was, they carefully hid the thing from light and sight, and guarded it as a menace. They did not wish to destroy a thing so rich in later experimental possibilities. Now and then some rash, unscrupulous adventurer would furtively gain access to it and sample its perilous powers despite the consequences — but all such cases were discovered, and safely and drastically dealt with.
Of this evil meddling the only bad result was that the worm-like outside race learned from the new exiles what had happened to their explorers on earth, and conceived a violent hatred of the planet and all its life-forms. They would have depopulated it if they could, and indeed sent additional cubes into space in the wild hope of striking it by accident in unguarded places — but that accident never came to pass.
The cone-shaped terrestrial beings kept the one existing cube in a special shrine as a relique and basis for experiments, till after aeons it was lost amidst the chaos of war and the destruction of the great polar city where it was guarded. When, fifty million years ago, the beings sent their minds ahead into the infinite future to avoid a nameless peril of inner earth, the whereabouts of the sinister cube from space were unknown.
This much, according to the learned occultist, the Eltdown Shards had said. What now made the account so obscurely frightful to Campbell was the minute accuracy with which the alien cube had been described. Every detail tallied — dimensions, consistency, hieroglyphed central disc, hypnotic effects. As he thought the matter over and over amidst the darkness of his strange situation, he began to wonder whether his whole experience with the crystal cube — indeed, its very existence — were not a nightmare brought on by some freakish subconscious memory of this old bit of extravagant, charlatanic reading. If so, though, the nightmare must still be in force; since his present apparently bodiless state had nothing of normality in it.
Of the time consumed by this puzzled memory and reflection, Campbell could form no estimate. Everything about his state was so unreal that ordinary dimensions and measurements became meaningless. It seemed an eternity, but perhaps it was not really long before the sudden interruption came. What happened was as strange and inexplicable as the blackness it succeeded. There was a sensation — of the mind rather than of the body — and all at once Campbell felt his thoughts swept or sucked beyond his control in tumultuous and chaotic fashion.