"I walked across the courtyard, then stopped abruptly and looked up. A strange sound had come to my ears from above, a sound that was like distant, shrill whistling. It hung for a moment, faint and eery, then grew much louder, like a score of men whistling piercingly in different keys, varied, tumultuous. I half expected to see birds passing above, but there were none. The air had been heavy and still for hours, but now a puff of wind smote me, a little, buffeting breeze that changed suddenly to a hard wind and then to a raging gale that whipped the sun-helmet off my head and nearly twisted me from my feet. And with that sudden change, the whistling chorus above had changed also, had waxed to a raging tumult of wind-shrieks, piercing, tempestuous! Abruptly, now, there flashed into being in the air forty feet above me--a thing! "It was a swirling mass of dense gray vapor, looking in the moonlight much like a drifting cloud of steam. But this smoky mass was alive with motion of its own, spinning and interlacing, and from it came the shrill chorus and the raging winds. And, too, I saw that somewhere inside those shifting mists glowed three little circles of green light, one set above the other two, three tiny, radiant orbs whose brilliance stood out even in the mellow moonlight. * * * * * "Abruptly, as I stared up at the thing, those three circles of vivid green luminescence changed to purple, no less brilliant. And at the same instant, there came a change to the spinning mists around them. Those mists seemed to contract, to shrink, to solidify, and then they had vanished and in place of them hung a thing of solid matter, a mass of what seemed to be gray, resilient flesh, and at the center of which hung steadily the little triangle of purple lights. Nor was this solid mass any more unchanging than the misty one had been, for it seemed to have no one form, flashing with incredible speed through a myriad half-glimpsed shapes. It folded and unfolded, contracted, elongated, spun and writhed, a protean changing of shapes that my eyes could scarcely follow. But always the three little orbs of purple hung unchanged at its center. "Scarcely more than a minute had elapsed since the thing first had appeared above me, and now as I gazed up at it, stupefied, I sensed dimly that the whistling sounds and the winds had died away. Then, before my dazed mind could fully comprehend the strangeness of the creature that hung in the air above me, that creature floated swiftly down beside me, so near that I could have touched it. And out from the changing, inchoate mass of it reached a long, twisting tentacle, straight toward me!