In fact, precisely at this transitional point of its nightly roll into darkness the great and particular glory of the Egdon waste began, and nobody could be said to understand the heath who had not been there at such a time. It could best be felt when it could not clearly be seen, its complete effect and explanation lying in this and the succeeding hours before the next dawn; then, and only then, did it tell its true tale.
Bk. I, ch. 1 - The Return of the Native (1878)