He had been accustomed to solving such all his life, and he believed that he was able to do it now.
He went to work carefully with his pocket compass to locate his position.
He remembered that the mouth of the cave faced due east.
By keeping to every passage that led in that direction it certainly seemed as if he ought to get out eventually.
Frank happily had a piece of chalk in his pocket.
This he employed in carefully marking numbers upon the wall of every passage into which he turned.
Some of the passages leading eastward would come to a termination in a most exasperating manner after having been followed for a long way.
Others would turn back upon themselves or wind again into the maze.
In this case Frank would be compelled to return to the point of beginning.
Then he would begin over again and take another passage.