The Alien Intelligence by Jack Williamson

First I heard a faint whispering sound, or rather a hiss, infinitely far away, and up, I thought, over the cliffs. Then the cloth of the tent was lighted by a faint red glow thrown on it from above. I shivered and the strange spell of the mountain and the desert fell heavier upon me. I wanted to go out and investigate; but unfamiliar terror held me powerless. I gripped my automatic and waited tensely. The scarlet radiance shone ever brighter through the cloth. The sound turned to a hissing, shrieking scream. It was deafening, and it plunged straight down. It seemed to pause, to hover overhead. The red glare was almost blinding. Abruptly the tent was blown down by a sudden tempest of wind. For perhaps a minute the terror hung about me. I lay there in a strange paralysis of fear, while a hurricane of wind tore at the canvas upon me. I heard upon the tempest, above that awful whistling, a wild mad laugh that rang against the cliff, weirdly appalling. It was utterly inhuman, not even the laugh of a madman. Just once it rang out, and afterwards I imagined it had been my fancy.

Then the light and the sound swept up and away. With belated courage I tore my way from under the cloth. The stars were like jewels in the westward sky, where the zodiacal light was still visible. The ominous blackness of the mountain blotted out the eastern stars; and the peaks were lighted by a vague and flickering radiance of scarlet, like the reflection of unpleasant fires beyond. Strange pulsing, exploring fingers of red seemed to thrust themselves up from behind the cliff. Somehow they gave me the feeling that an incredibly great, incredibly evil personality lurked beyond. The crimson light shone weirdly on the wild summits of the mountain, as if they were smeared with blood.