Next day Will walked for hours and saw no one.

She's been walking for hours and has had no luck.

At last light he got up and headed due west, walking for several hours.

They walked for several hours before stopping to eat and rest.

But he has been walking for hours and is starting to worry.

He walked for hours, from one end of the city to the other.

One could walk for hours in this fascinating park and see something interesting at every step.

He bought her a late dinner at Child's, and they walked for hours under the lights.

They had been walking for several hours, and he knew that she was getting tired.

I used to walk about for hours holding them in the air.