The moon is dead. In so much science is right. It is lifeless, without moisture, without an atmosphere. Croft won his great experiment, or its first step at least. His body sank to sleep, but his ego leaped into a fuller, wider life. There was a sensation of airy lightness, as though his sublimated consciousness had dropped material weight. His body sat beneath him in the chair. He could see it. He could see the city and the lake and the mountains and the yellow disk of the moon. He knew he was rising toward the latter swiftly. Then--space was annihilated in an instant, and he seemed to himself to be standing on the topmost edge of a mighty crater in the full, unobstructed glare of a blinding light. He sensed that as the sun, which hung like a ball of fire halfway up from the horizon, flinging its rays in a dazzling brilliance against the dead satellite's surface, unprotected by an atmospheric screen. His first sensation was an amazing realization of his own success. Then he gazed about. * * * * * To one side was the vast ring of the crater itself, a well of unutterable darkness and unplumbed depth, as yet not opened up to the burning light of the sun. To the other was the downward sweep of the crater's flank, dun, dead, wrinkled, seamed and seared by the stabbing rays which bathed it in pitiless light. And beyond the foot of the crater was a vast irregular plain, lower in the center as though eons past it might have been the bed of some vanished sea. About the plain were the crests of barren mountains, crags, pinnacles, misshapen and weird beyond thought. Yes, the moon is dead--now. But--there was life upon it once. Croft willed himself down from the lip of the crater to the plain. He moved about it. Indeed it had been a sea. There in the airless blaze, still etched in the lifeless formations, he found an ancient water-line, the mark of the fingers of vanished waters--like a mockery of what had been. And skirting the outline of that long-lost sea, he came to the ruin of a city which had stood upon the shores a myriad years ago. It stood there still--a thing of paved streets, and dead walls, safe in that moistureless world from decay. Through those dead streets and houses, some of them thrown down by terrific earthquakes which he judged had accompanied the final cooling stages and death of the moon, Croft took his way, pausing now and then to examine some ancient inscriptions cut into the blocks of stone from which the buildings had been reared. In a way they impressed him as similar in many respects to the Asiatic structures of today, most of them being windowless on the first story, but built about an inner court, gardens of beauty in the time when the moon supported life.