Once inside with the door locked behind me, I spent some time in thought.

First he left me with the door locked for about two hours, sitting in the dark.

You didn't even need to lock your door at night.

So I locked my door and went out into the street.

He went back inside, making sure to lock the front door.

Then I locked the door of the study and went up to bed.

He let himself out and locked the door behind him.

He locked the door of the town house behind him.

Back in the room she again locked the door behind her and went over to the little window.

I'm going to leave you down here and lock the door at the top.