"Say, fellows, do you notice that man in a gray suit and a black slouch hat across the street?"
"I see him," admitted Blake.
"Have you seen him before?" Joe asked.
"Yes, I have," said Blake. "He was in the movies with us, and I saw him when we left the hotel."
"So did I," went on Joe. "And doesn't it strike you as being peculiar?"
"In what way?" asked Charles.
"I mean he seems to be following us."
"What in the world for?" asked the assistant.
"Well," went on Joe slowly, "I rather think we're under suspicion. That's the way it strikes me!"