The Rainbow by D H Lawrence Chapter 6 Page 122

After this day, the door seemed to shut on his mind. His brow shut and became impervious. His eyes ceased to see, his hands were suspended. Within himself his will was coiled like a beast, hidden under the darkness, but always potent, working.

At first she went on blithely enough with him shut down beside her. But then his spell began to take hold of her. The dark, seething potency of him, the power of a creature that lies hidden and exerts its will to the destruction of the free-running creature, as the tiger lying in the darkness of the leaves steadily enforces the fall and death of the light creatures that drink by the waterside in the morning, gradually began to take effect on her.

Though he lay there in his darkness and did not move, yet she knew he lay waiting for her.