Quickly I checked the rest of the ship to make sure he'd been the only one left on guard.

If the phone was dead, then it was likely that no one had been left on guard.

But as these two men seem rather interested in our caravans, perhaps we had better leave him on guard again.

They'd left someone on guard at the loading bay door.

The big man with the boy and the others who must have been left on guard.

She saw the officer she'd left on guard at the end of the hallway.

Take that thing you call a Schmeisser in case they left someone on guard.

Everyone would be gone now but the police who had been left on guard.

Tell him to leave another servant on guard and come to me at once.

I can leave someone here on guard, if you like.