The Martian rat is a fierce and unlovely thing. It is many-legged and hairless, its hide resembling that of a newborn mouse in repulsiveness. In size and weight it is comparable to a large Airedale terrier. Its eyes are small and close-set, and almost hidden in deep, fleshy apertures. But its most ferocious and repulsive feature is its jaws, the entire bony structure of which protrudes several inches beyond the flesh, revealing five sharp, spadelike teeth in the upper jaw and the same number of similar teeth in the lower, the whole suggesting the appearance of a rotting face from which much of the flesh has sloughed away.

It was such a thing that leaped upon the breast of the panthan to tear at his jugular. Twice Turan struck it away as he sought to regain his feet, but both times it returned with increased ferocity to renew the attack. Its only weapons are its jaws since its broad, splay feet are armed with blunt talons. With its protruding jaws it excavates its winding burrows and with its broad feet it pushes the dirt behind it. To keep the jaws from his flesh then was Turan's only concern and this he succeeded in doing until chance gave him a hold upon the creature's throat. After that the end was but a matter of moments. Rising at last he flung the lifeless thing from him with a shudder of disgust.

Now he turned his attention to a hurried inventory of the new conditions which surrounded him since the moment of his incarceration. He realized vaguely what had happened. He had been anaesthetized and stripped of his weapons, and as he rose to his feet he saw that one ankle was fettered to a chain in the wall. He looked about the room. All the doors swung wide open! His captors would render his imprisonment the more cruel by leaving ever before him tempting glimpses of open aisles to the freedom he could not attain. Upon the end of the table and within easy reach was food and drink. This at least was attainable and at sight of it his starved stomach seemed almost to cry aloud for sustenance. It was with difficulty that he ate and drank in moderation.

As he devoured the food his eyes wandered about the confines of his prison until suddenly they seized upon a thing that lay on the table at the end farthest from him. It was a key. He raised his fettered ankle and examined the lock. There could be no doubt of it! The key that lay there on the table before him was the key to that very lock. A careless warrior had laid it there and departed, forgetting.

Hope surged high in the breast of Gahan of Gathol, of Turan the panthan. Furtively his eyes sought the open doorways. There was no one in sight. Ah, if he could but gain his freedom! He would find some way from this odious city back to her side and never again would he leave her until he had won safety for her or death for himself.

He rose and moved cautiously toward the opposite end of the table where lay the coveted key. The fettered ankle halted his first step, but he stretched at full length along the table, extending eager fingers toward the prize. They almost laid hold upon it-a little more and they would touch it. He strained and stretched, but still the thing lay just beyond his reach. He hurled himself forward until the iron fetter bit deep into his flesh, but all futilely. He sat back upon the bench then and glared at the open doors and the key, realizing now that they were part of a well-laid scheme of refined torture, none the less demoralizing because it inflicted no physical suffering.

For just a moment the man gave way to useless regret and foreboding, then he gathered himself together, his brows cleared, and he returned to his unfinished meal. At least they should not have the satisfaction of knowing how sorely they had hit him. As he ate it occurred to him that by dragging the table along the floor he could bring the key within his reach, but when he essayed to do so, he found that the table had been securely bolted to the floor during the period of his unconsciousness. Again Gahan smiled and shrugged and resumed his eating.

* * * * *

When the warriors had departed from the prison in which Ghek was confined, the kaldane crawled from the shoulders of the rykor to the table. Here he drank a little water and then directed the hands of the rykor to the balance of it and to the food, upon which the brainless thing fell with avidity. While it was thus engaged Ghek took his spider-like way along the table to the opposite end where lay the key to the fetter. Seizing it in a chela he leaped to the floor and scurried rapidly toward the mouth of one of the burrows against the wall, into which he disappeared. For long had the brain been contemplating these burrow entrances. They appealed to his kaldanean tastes, and further, they pointed a hiding place for the key and a lair for the only kind of food that the kaldane relished-flesh and blood.

Ghek had never seen an ulsio, since these great Martian rats had long ago disappeared from Bantoom, their flesh and blood having been greatly relished by the kaldanes; but Ghek had inherited, almost unimpaired, every memory of every ancestor, and so he knew that ulsio inhabited these lairs and that ulsio was good to eat, and he knew what ulsio looked like and what his habits were, though he had never seen him nor any picture of him. As we breed animals for the transmission of physical attributes, so the Kaldanes breed themselves for the transmission of attributes of the mind, including memory and the power of recollection, and thus have they raised what we term instinct, above the level of the threshold of the objective mind where it may be commanded and utilized by recollection. Doubtless in our own subjective minds lie many of the impressions and experiences of our forebears. These may impinge upon our consciousness in dreams only, or in vague, haunting suggestions that we have before experienced some transient phase of our present existence. Ah, if we had but the power to recall them! Before us would unfold the forgotten story of the lost eons that have preceded us. We might even walk with God in the garden of His stars while man was still but a budding idea within His mind.

Ghek descended into the burrow at a steep incline for some ten feet, when he found himself in an elaborate and delightful network of burrows! The kaldane was elated. This indeed was life! He moved rapidly and fearlessly and he went as straight to his goal as you could to the kitchen of your own home. This goal lay at a low level in a spheroidal cavity about the size of a large barrel. Here, in a nest of torn bits of silk and fur lay six baby ulsios.

When the mother returned there were but five babies and a great spider-like creature, which she immediately sprang to attack only to be met by powerful chelae which seized and held her so that she could not move. Slowly they dragged her throat toward a hideous mouth and in a little moment she was dead.

Ghek might have remained in the nest for a long time, since there was ample food for many days; but he did not do so. Instead he explored the burrows. He followed them into many subterranean chambers of the city of Manator, and upward through walls to rooms above the ground. He found many ingeniously devised traps, and he found poisoned food and other signs of the constant battle that the inhabitants of Manator waged against these repulsive creatures that dwelt beneath their homes and public buildings.

His exploration revealed not only the vast proportions of the network of runways that apparently traversed every portion of the city, but the great antiquity of the majority of them. Tons upon tons of dirt must have been removed, and for a long time he wondered where it had been deposited, until in following downward a tunnel of great size and length he sensed before him the thunderous rush of subterranean waters, and presently came to the bank of a great, underground river, tumbling onward, no doubt, the length of a world to the buried sea of Omean. Into this torrential sewer had unthinkable generations of ulsios pushed their few handsful of dirt in the excavating of their vast labyrinth.