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..