There came a sense of peace unlike any he had ever known, even in the deepest meditation, the most sound sleep.

It will do him no harm to have a night's really sound sleep.

But sound sleep is not what Henry typically experiences.

I had slept for over eight hours, and nothing is so healing as sound sleep.

The players wanted to get rest tonight, but sound sleep may be difficult until the series ends.

Now, why that should have startled him out of perfectly sound sleep was at first a complete mystery.

But she had hold of his arm at the moment, and was dragging him out of a very sound sleep.

For a moment she lay very still, uncertain what had brought her out of a surprisingly sound sleep.

Oddly, it was the soundest sleep he could remember having in recent memory.

It must have been four in the morning before I dropped off into a really sound sleep, and what was left of the night passed swiftly.