The party observed Zamacona’s fright, and hastened to reassure him as much as possible. The beasts or gyaa-yothn, they explained, surely were curious things; but were really very harmless. The flesh they ate was not that of intelligent people of the master-race, but merely that of a special slave-class which had for the most part ceased to be thoroughly human, and which indeed was the principal meat stock of K’n-yan. They — or their principal ancestral element — had first been found in a wild state amidst the Cyclopean ruins of the deserted red-litten world of Yoth which lay below the blue-litten world of K’n-yan. That part of them was human, seemed quite clear; but men of science could never decide whether they were actually the descendants of the bygone entities who had lived and reigned in the strange ruins. The chief ground for such a supposition was the well-known fact that the vanished inhabitants of Yoth had been quadrupedal. This much was known from the very few manuscripts and carvings found in the vaults of Zin, beneath the largest ruined city of Yoth. But it was also known from these manuscripts that the beings of Yoth had possessed the art of synthetically creating life, and had made and destroyed several efficiently designed races of industrial and transportational animals in the course of their history — to say nothing of concocting all manner of fantastic living shapes for the sake of amusement and new sensations during the long period of decadence. The beings of Yoth had undoubtedly been reptilian in affiliations, and most physiologists of Tsath agreed that the present beasts had been very much inclined toward reptilianism before they had been crossed with the mammal slave-class of K’n-yan.
It argues well for the intrepid fire of those Renaissance Spaniards who conquered half the unknown world, that Pánfilo de Zamacona y Nuñez actually mounted one of the morbid beasts of Tsath and fell into place beside the leader of the cavalcade — the man named Gll’-Hthaa-Ynn, who had been most active in the previous exchange of information. It was a repulsive business; but after all, the seat was very easy, and the gait of the clumsy gyaa-yoth surprisingly even and regular. No saddle was necessary, and the animal appeared to require no guidance whatever. The procession moved forward at a brisk gait, stopping only at certain abandoned cities and temples about which Zamacona was curious, and which Gll’-Hthaa-Ynn was obligingly ready to display and explain. The largest of these towns, B’graa, was a marvel of finely wrought gold, and Zamacona studied the curiously ornate architecture with avid interest. Buildings tended toward height and slenderness, with roofs bursting into a multitude of pinnacles. The streets were narrow, curving, and occasionally picturesquely hilly, but Gll’-Hthaa-Ynn said that the later cities of K’n-yan were far more spacious and regular in design. All these old cities of the plain shewed traces of levelled walls — reminders of the archaic days when they had been successively conquered by the now dispersed armies of Tsath.
There was one object along the route which Gll’-Hthaa-Ynn exhibited on his own initiative, even though it involved a detour of about a mile along a vine-tangled side path. This was a squat, plain temple of black basalt blocks without a single carving, and containing only a vacant onyx pedestal. The remarkable thing about it was its story, for it was a link with a fabled elder world compared to which even cryptic Yoth was a thing of yesterday. It had been built in imitation of certain temples depicted in the vaults of Zin, to house a very terrible black toad-idol found in the red-litten world and called Tsathoggua in the Yothic manuscripts. It had been a potent and widely worshipped god, and after its adoption by the people of K’n-yan had lent its name to the city which was later to become dominant in that region. Yothic legend said that it had come from a mysterious inner realm beneath the red-litten world — a black realm of peculiar-sensed beings which had no light at all, but which had had great civilisations and mighty gods before ever the reptilian quadrupeds of Yoth had come into being. Many images of Tsathoggua existed in Yoth, all of which were alleged to have come from the black inner realm, and which were supposed by Yothic archaeologists to represent the aeon-extinct race of that realm. The black realm called N’kai in the Yothic manuscripts had been explored as thoroughly as possible by these archaeologists, and singular stone troughs or burrows had excited infinite speculation.
When the men of K’n-yan discovered the red-litten world and deciphered its strange manuscripts, they took over the Tsathoggua cult and brought all the frightful toad images up to the land of blue light — housing them in shrines of Yoth-quarried basalt like the one Zamacona now saw. The cult flourished until it almost rivalled the ancient cults of Yig and Tulu, and one branch of the race even took it to the outer world, where the smallest of the images eventually found a shrine at Olathoë, in the land of Lomar near the earth’s north pole. It was rumoured that this outer-world cult survived even after the great ice-sheet and the hairy Gnophkehs destroyed Lomar, but of such matters not much was definitely known in K’n-yan. In that world of blue light the cult came to an abrupt end, even though the name of Tsath was suffered to remain.