Now he was calm again, though his mind, searching for ways of escape, was too active to allow sleep.

His face was peaceful, but very tired, as though he had at last shed some terrible burden and allowed sleep to overtake him.

I was not allowed enough sleep.

Shannow gave up and lay back on the blanket, allowing sleep to wash over him.

During the first three days he is allowed no food or sleep and told to write an exhaustive essay on his life to date.

He lay down wearily, only to find his nerves still too strung up to allow sleep.

A few hours of work on the manuscript might soothe her nerves enough to allow sleep.

Maybe it's a good thing I don't have a lover, she thought muzzily as she allowed sleep to take her.

One evening, when he yawned, I asked him how much sleep he allowed himself.

Minds simply refused to let go enough to allow deep sleep.