I retrieved my pack from the locker under the sentry box.
He pulled his car up to the sentry box by the gate and waved at the guard.
A soldier stepped from the sentry box and challenged them.
Robert Jordan looked down through the pines to the sentry box again.
The guard inside the adjoining sentry box took her name, then made a brief call.
It was down another path, through more pine trees and beyond a white sentry box.
The guard went back into the sentry box and picked up a telephone.
The man in the sentry box stood up when he heard the bombs.
Would I have time to make it to the sentry box?
Passing the sentry box at the end of the drive, they heard a voice from a portable radio inside.
