Mercifully, his body's total exhaustion forced him to drop into a deep sleep.

John Player had suddenly dropped into a sleep of exhaustion.

He was talking to the veteran, who didn't answer because he'd dropped into a deep, anesthetic sleep.

After a while he dropped into a light sleep.

After this little bit of astronomical recreation, I dropped into a sound sleep.

And after a time, the wine worked, and I dropped into a restless sleep.

She immediately dropped into a deep sleep again, lying still in his arms.

After that she began to wander a little, and finally dropped into a troubled sleep.

At last Sturm dropped into a light and troubled sleep.

That night, I dropped into an exhausted sleep, deeper than dreams of regret.