Jack looked about the room for something to read. He found among other books a small volume, purporting to contain "The Adventures of Baron Trenck."
It may be that the reader has never encountered a copy of this singular book. Baron Trenck was several times imprisoned for political offenses, and this book contains an account of the manner in which he succeeded, after years of labor, in escaping from his dungeon.
Jack read the book with intense interest and wondered, looking about the room, if he could not find some similar plan of escape.
CHAPTER XXVIII
THE SECRET STAIRCASE
The prospect certainly was not a bright one. The door was fast locked. Escape from the windows seemed impracticable. This apparently exhausted the avenues of escape that were open to the dissatisfied prisoner. But accidentally Jack made an important discovery.
There was a full-length portrait in the room. Jack chanced to rest his hand against it, when he must unconsciously have touched some secret spring, for a secret door opened, dividing the picture in two parts, and, to our hero's unbounded astonishment, he saw before him a small spiral staircase leading down into the darkness.
"This is a queer old house!" thought Jack. "I wonder where those stairs go to. I've a great mind to explore."
There was not much chance of detection, he reflected, as it would be three hours before his next meal would be brought him. He left the door open, therefore, and began slowly and cautiously to go down the staircase. It seemed a long one, longer than was necessary to connect two floors. Boldly Jack kept on till he reached the bottom.