One thought kept running through his mind: Three and a half hours.

She considered going to the emergency room, but it was a Saturday and the thought of the wait kept her home.

The thought had kept him awake more than one night.

Only the thought of shopping again kept me at it.

Just the thought of it would keep him running for a month.

And if that thought doesn't keep me awake tonight, I guess nothing will.

"But the thought of the consequences kept me from doing it," he said.

The thought of it kept me working, though I didn't seem to be getting very far.

The thought was a dark one and kept haunting her.

This thought had kept him at the office until three in the morning.