Miss Penfold was evidently trying to open the chamber; and, though she knew the lock could not open so long as she held the pistol in the place, she felt her breath coming fast and her heart beating.

For five minutes the attempts to open the door continued.

Then all was still again.
For half an hour she remained without moving; then, as all continued quiet, she guessed that Miss Penfold, finding the springs did not act, had returned to her room.

She now rose to her feet, drew out her dark lantern, and turned to the wall by her side.

She gave an exclamation of joy--the stone that she had so long vainly endeavored to move was swung open.