“Tell me, how do you figure it out?”
“It’s very simple,” was Paul’s answer. “Only one book was stolen. Of course, the book was an old edition and valuable, but valuable only to a man like Professor Link. In actual money, the book is worth perhaps ten or fifteen dollars; but if the thief was going to sell it, he wouldn’t get more than four or five dollars for it.”
“Yes,” added Jack, “there were more valuable things in the room, if the thief had been interested in stealing something valuable. That is in itself enough to show that the thief, whoever he was, was either a maniac or one who was interested in obtaining only that book and nothing else. But an ordinary, normal man, would not break into a house to steal something like that.”
“Maybe,” remarked Ken doubtfully, “but—”
Paul interrupted, saying, “Let’s go over to Bobolink and get him to go over to Professor Link. He is Bobolink’s grandfather, isn’t he?”
“Yes. Let’s do that.”
The boys wended their way to Bobolink’s home and luckily found him still in. He was glad to see them, and commented, “I was just going to call you fellows.”
“What for?”
“I thought that perhaps you might be interested in accompanying me to my grandfather’s home.”