“Our business is none of your business,” declared Dick.

“Of that I will judge when I am satisfied that I have learned your business.”

“We are traveling.”

“For what purpose?”

“To see the world.”

“Two boys and an old man. In Italy your behavior was suspicious. You disappeared from Naples in great haste, without explaining why you left so suddenly or whither you went.”

“Great tarantulas!” muttered Brad. “He’s even got track of us as far back as that.”

“In Venice you were concerned in some singular and unaccountable things, and in Greece you had dealings with lawless characters. Had you remained in Athens, you must have explained your actions to officials of the city government. You left there, also, in haste.”

Dick wondered that the man should know so much of their movements.

“It seems,” continued Achmet, “that in various places the police have been warned against you; but that in each instance they sought to find out about you only to find you suddenly departed.”