“That sounds logical,” admitted Cardona. “Perhaps the man was under some great nervous strain—”
“Unquestionably.”
“Or else—”
“What?” Blefken waited.
“A drug addict!”
“Hardly! The letter is not flighty enough for that.”
“You missed my point,” said Cardona. “I have seen plenty of dope fiends. When they are not under the influence of the drug, they are nervous, changeable, and annoyed. I’ll bet this fellow’s a ‘coke’!”
The detective’s words were so emphatic that Blefken nodded his agreement.
“Well,” said Cardona, “if he really means what he says, we can find out a lot about him.”
“How? By tracing the cab driver?” asked Blefken.