As he hurried along, Steve realized that through the woods shadows were deepening on every hand, while in the glades and open spots the light had a curious greenish-saffron tint that urged him to his utmost speed. Emerging finally on the shore he saw that there was no time to lose. The sun had disappeared. Above him the sky glowed with an unnatural light, while piled up in the east were great banks of black, ragged looking clouds.