“Dick,” he said, “you mustn’t forget one thing.”
“What is that?”
“The threat made by the Professor; he warned you that he was not through with you.”
“Another vaporing of a disordered brain,” replied Dick airily.
“None the less it must not be forgotten,” added Hunter; “I know of the case of a lunatic in Mississippi who was offended by an old friend, and who nursed his revenge for more than three years and then assassinated his unsuspecting comrade of former days.”
“What can the Professor do to hurt us?”
Harvey recalled the incident of the Professor blowing up the kidnappers’ cabin in eastern Pennsylvania.
“He manufactures and carries at times torpedoes of the most destructive nature. Suppose he circles above us and drops a half dozen on our heads or this tent.”
“In that case,” said Dick, “we should be justified in using our rifles and I calculate we could do it before he got in his work.”
“He may wait till we are all asleep inside.”