grow dark

On they went, and when they reached the center of the valley, where the great stone castle stood, it was68 beginning to grow dark.

Before the 29th was finished, it was beginning to grow dark.

The murky atmosphere, obscured by storm-clouds, made the evening grow dark earlier than is usual in northern latitudes.

By-and-by, however, it began to grow dark, and he thought that the moment had arrived for them to start for the palace.

As soon as it began to grow dark Tom and his companion started back to where they had left the cow.