Edmond Hamilton,
The time-raider
(1927)
“ Came another buffeting breeze, a tempest of shrill wind-sounds, and with startling suddenness the Raider reappeared, flashing back into being at the same spot where it had vanished, above the center of the abyss. Again the green orbs changed to purple, and its cloudy mass contracted to the shifting but solid form it had occupied before. But now, held in its shapeless self, were men, who hung helpless in its grasp. It drifted over to the marble edge of the abyss, and loosed the men it held, then moved back to the pit's center. ”
