He was walking down the main corridor on the ground floor.

At that time the main corridor was almost 1,000 feet long.

He led me back up the hall to the main corridor.

She walked quickly down the main corridor where they had all been standing.

Another door opened, and they were in the main corridor.

Then one of them took post at the door to the main corridor.

Then it passed, and he was moving down the main corridor.

The hope died as he came to the main corridor.

His only course must be to keep on this main corridor.

The building is basic with a two story design and three main corridors.