"I can't understand it," he said to himself. "At one time he is as sane as I am, and again, he is violent. I know they are detaining him here for a purpose. Perhaps they do something to him to make him insane at times."
The thought was a new one, and it came to Frank in a flash that perhaps that was the real explanation.
"If it is there is hope for him," he said. "Oh, I only wish I had him away from the horrible place!"
Then, late that afternoon, he made his way to the town of Lockport, where, with money he had brought with him from camp, he engaged a room at a hotel. The next morning he started back to join his friends.
CHAPTER XXV
FRANK'S SECRET DISCLOSED
When Ned had finished reading the advertisement in the newspaper which Frank dropped that afternoon as he was leaving camp, the three chums looked at one another, vaguely wondering what it meant.
"Do you suppose he's gone to get that place?" asked Fenn.
"I think so," Ned replied.
"But why would he want to do that?" asked Bart.
"I have a theory that Frank is much interested in the subject of insanity," Ned went on.