Then he made up his mind.

He drew her into his room and left her standing and staring at him while he thrust a few objects into his pockets and threw his fur coat over him.
"Stay here till I come back," he said, authoritatively, as he went out.
"But you will bring him here ?" she cried, suddenly conscious of his going.
The door had already closed.

She tried to open it, in order to follow him, but she could not.

The lock was of an unusual kind, and either intentionally or accidentally Keyork had shut her in.

For a few moments she tried to force the springs, shaking the heavy wood work a very little in the great effort she made.