She tried to fall into sleep once more, but could not.

Finally, her mother seemed to fall into a deep sleep.

At which point she fell back into a deep sleep.

They all left the room, and I fell into a deep sleep.

She took him through the dark back up to his room, and he fell into a deep sleep.

Finally, the child stopped talking and fell into a deep sleep.

A few minutes later Tom fell into a deep sleep.

Instead, her eyes closed and she fell into a deep sleep.

He closed his eyes and fell quickly into a deep sleep.

It was after six before George finally fell into a deep sleep.