"Did you ever hear of the Chamats?" I asked him. He shook his head.

"In Papua," I explained, "there is a wide-spread and immeasurably old tradition that 'imprisoned under the hills' is a race of giants who once ruled this region 'when it stretched from sun to sun before the moon god drew the waters over it'—I quote from the legend. Not only in Papua but throughout Malaysia you find this story. And, so the tradition runs, these people—the Chamats—will one day break through the hills and rule the world; 'make over the world' is the literal translation of the constant phrase in the tale. It was Herbert Spencer who pointed out that there is a basis of fact in every myth and legend of man. It is possible that these survivors I am discussing form Spencer's fact basis for the Malaysian legend.[1]

"This much is sure—the moon door, which is clearly operated by the action of moon rays upon some unknown element or combination and the crystals through which the moon rays pour down upon the pool their prismatic columns, are humanly made mechanisms. So long as they are humanly made, and so long as it is this flood of moonlight from which the Dweller draws its power of materialization, the Dweller itself, if not the product of the human mind, is at least dependent upon the product of the human mind for its appearance."

"Wait a minute, Goodwin," interrupted O'Keefe. "Do you mean to say you think that this thing is made of—well—of moonshine?"

"Moonlight," I replied, "is, of course, reflected sunlight. But the rays which pass back to earth after their impact on the moon's surface are profoundly changed. The spectroscope shows that they lose practically all the slower vibrations we call red and infra-red, while the extremely rapid vibrations we call the violet and ultra-violet are accelerated and altered. Many scientists hold that there is an unknown element in the moon—perhaps that which makes the gigantic luminous trails that radiate in all directions from the lunar crater Tycho—whose energies are absorbed by and carried on the moon rays.

"At any rate, whether by the loss of the vibrations of the red or by the addition of this mysterious force, the light of the moon becomes something entirely different from mere modified sunlight—just as the addition or subtraction of one other chemical in a compound of several makes the product a substance with entirely different energies and potentialities.

"Now these rays, Larry, are given perhaps still another mysterious activity by the globes through which Throckmartin said they passed in the Chamber of the Moon Pool. The result is the necessary factor in the formation of the Dweller. There would be nothing scientifically improbable in such a process. Kubalski, the great Russian physicist, produced crystalline forms exhibiting every faculty that we call vital by subjecting certain combinations of chemicals to the action of highly concentrated rays of various colours. Something in light and nothing else produced their pseudo-vitality. We do not begin to know how to harness the potentialities of that magnetic vibration of the ether we call light."

"Listen, Doc," said Larry earnestly, "I'll take everything you say about this lost continent, the people who used to live on it, and their caverns, for granted. But by the sword of Brian Boru, you'll never get me to fall for the idea that a bunch of moonshine can handle a big woman such as you say Throckmartin's Thora was, nor a two-fisted man such as you say Throckmartin was, nor Huldricksson's wife—and I'll bet she was one of those strapping big northern women too—you'll never get me to believe that any bunch of concentrated moonshine could handle them and take them waltzing off along a moonbeam back to wherever it goes. No, Doc, not on your life, even Tennessee moonshine couldn't do that—nix!"

"All right, O'Keefe," I answered, now very much irritated indeed. "What's your theory?" And I could not resist adding: "Fairies?"

"Professor," he grinned, "if that Thing's a fairy it's Irish and when it sees me it'll be so glad there'll be nothing to it. 'I was lost, strayed, or stolen, Larry avick,' it'll say, 'an' I was so homesick for the old sod I was desp'rit,' it'll say, an' 'take me back quick before I do any more har-rm!' it'll tell me—an' that's the truth.