It is due to an overweighing of the pituitary, controller of good brain tone, and alive wakefulness, by the demands of the organism.

For the two sorts of dreams, in sleep and in apparent wakefulness, seem, to the subject, to differ in kind.

And so, from dreamy wakefulness to total oblivion he passed to and fro, without an interval to part the real from the unreal.

For hours he remained stretched on his bed, now a prey to feverish and agitated wakefulness, now in the grip of oppressive dreams in which he tumbled down flights of stairs and felt himself sinking, powerless, into abysmal depths.

It was long before he fell asleep; but when he did, the sleep was more terrible than the haunted wakefulness.

Its use is a prolific source of indigestion, palpitation of the heart, persistent wakefulness, and of other disorders.

And it seemed to her, as so often in that half-sleep, half-wakefulness, when the drowsy brain knows all necessary things and awakes alert again in an instant at any unusual movement or sound, as if these sounds began to take on them tones of other causes than those of themselves.

She went over it and over it, lying in stubborn troubled wakefulness.

There were hours, particularly those hours of sudden wakefulness in the middle of the night when our minds lose their sense of proportion, in which Theophil agonised beyond endurance, and, as on that afternoon when he had found Jenny's diary, said to himself with merciless reiteration, "She seems to have had a shock""It was you who killed Jenny.

She went over it and over it, lying in stubborn troubled wakefulness.

So all through the long night those two sat together, while the old man passed from uneasy slumber to more uneasy wakefulness, and back to troubled sleep again, his breathing growing heavier and more laboured with every hour.

The pools themselves shone with a startling silverso hushed, so dreamy was all that surrounded them that there seemed something of an unnatural wakefulness, a daylight observation, in their brilliant surfaces,and on them, as last year, the lilies floated like the crowns of sunken queens.