Assisted from the vehicle that had brought him to this obvious center of the disc's activities. Kendrick was led into a monumental structure of jade-green stone that towered a full hundred, stories above the street level. There he was escorted into another of those projectilelike elevators, shot up, up--till at length it came to rest. The door opened and he was led out into a small lobby of the same amber crystal he had observed before. By now his guards had diminished to two, but he no longer made any effort to escape. Wherever this amazing adventure might lead, he was resolved to follow it through. One of the guards had advanced to a jewelled door and was pressing a button. In response, the door opened. A golden-robed, regal creature stood there. * * * * * Though dwarfed to four feet, like his fellow, he was obviously their mental superior to a prodigious degree. Not only was his symmetrical bald head of large brain content, but the finely-cut features of his parchment face bore the unmistakable stamp of a powerful intellect. "_Ao-chaa!_" commanded this evident monarch of the disc, addressing the guards. They bowed and departed, abruptly. "My dear Kendrick!" the regal personage now said, in thin, precise English. "It is indeed a pleasure to welcome you to my humble quarters. Pray enter and make yourself comfortable." Whereupon he ushered him into a dazzling apartment that was one vast mosaic of precious gems, indicated a richly carved chair, into which the young scientist dropped wonderingly. "Now then, Professor," continued the mighty little dwarf, when he was seated in a chair even more sumptuous, "suppose we have a friendly little discussion. I have been much interested in your experiments on heat radiation. What you demonstrated this morning, in particular, was most absorbing. You have hit upon a rather profound scientific principle, yes?" "Possibly," Kendrick admitted, quite conscious that he was being patronized. "Oh, don't be modest, my dear fellow!" smiled the dwarf. "I am the last one to belittle your achievement. Indeed, it is because of it that I have invited you here to-day. Permit me to introduce myself, and to make clear one or two possibly perplexing matters. Then I am sure we shall have a most agreeable chat." * * * * * His name was Cor, he said, and he was in truth the monarch of this strange realm. His people had come from the one-time planet of Vada, far distant in the universe. A thousand years ago, this planet had been doomed by the approach of an alien star. Their great scientist, Ravv, had met the emergency by inventing the disc, into whose construction they had poured all their resources. The pick of their populace had been salvaged on this giant life-raft. The rest had perished when that destroying star had crashed down on the doomed Vada.