"Suppose a policeman had been standing near, and had happened to see the whole thing."
"That is precisely why Patsy remained behind," explained the detective.
"Eh? I don't understand."
"If questions were asked, Patsy was there to explain and to show his authority, if necessary."
"I see."
"And he remained there, also, to observe what the other spies would do when this one disappeared. There are as many as half a dozen around us, right now."
"If that is so, one or more of them will follow the carriage, don't you think so?"
"Probably."
"You speak as if that is what you wished to have happen."
"I cannot pretend to understand you, Carter."