It was then, in the gathering twilight, that he thought he saw a faint trace of luminosity in the crazily angled stone. He had tried to look away from it, but some obscure compulsion drew his eyes back. Was there a subtle phosphorescence of radio-activity about the thing? What was it that the dead man's notes had said concerning a Shining Trapezohedron? What, anyway, was this abandoned lair of cosmic evil? What had been done here, and what might still be lurking in the bird-shunned shadows? It seemed now as if an elusive touch of foetor had arisen somewhere close by, though its source was not apparent. Blake seized the cover of the long-open box and snapped it down. It moved easily on its alien hinges, and closed completely over the unmistakably glowing stone.