"Is the door locked, Frank?"
"I must have locked it."
She looked at me, and got pale. She went to the swinging door, and peeped through. Then she went into the lunchroom, but in a minute she was back.
"They went away."
"I don’t know why I locked it."
"I forgot to unlock it."
She started for the lunchroom again, but I stopped her. "Let’s?leave it locked."