The Alien Intelligence by Jack Williamson

Before me, not half a mile away, rose the nearest ramparts of the Mountain of the Moon. It was after noon, and the red sun blazed down on the bare, undulating sandy waste with fearful intensity. The air was still and intolerably hot. Heat waves danced ceaselessly over the uneven sand. I felt the utter loneliness, the wild mystery, and the overwhelming power of the desert. The black cliffs rose cold and solid in the east -- a barrier of dark menace. Pillars of black basalt, of dark hornblende, and of black obsidian rose in a precipitous wall of sharp and jagged peaks that curved back to meet the horizon. Needle-like spires rose a thousand feet, and nowhere was the escarpment less than half that high. It was with mingled awe and incipient fear that I first looked upon the Mountain of the Moon.

It was a year since I had left medical college in America to begin practise in Perth, Australia. There I had an uncle who was my sole surviving relative. My companion on the voyage had been Dr. Horace Austen, the well-known radiologist, archeologist, and explorer. He had been my dearest friend. That he was thirty years my senior, had never interfered with our comradeship. It was he who had paid most of my expenses in school. He had left me at Perth, and went on to investigate some curious ruined columns that a traveler had reported in the western part of the Great Victoria Desert. There Austen had simply vanished. He had left Kanowna, and the desert had swallowed him up. But it was his way, when working on a problem, to go into utter seclusion for months at a time.