"If there was," declared Grady, "they didn't bother us any. I wasn't watching much. You told me that would be taken care of."
"When will you hear from those men you sent there?" Benson questioned Delmuth.
"Shamlin got them for me," said the advertising man. "They're going to report back to him. They don't know anything about what was going on. Their job was to nab all prowlers. That was all."
"You met Chadwick at midnight?" Benson asked Grady.
"That's when I met him," was the reply.
"Then," declared Benson. "I don't think there was any person watching the Green Mill."
"Why?" asked Delmuth.
"Because," said Benson calmly, "the trouble maker was watching us at that time. He could not have been at the Green Mill when Grady and Chadwick were there."
Delmuth nodded in agreement. He knew that by "trouble maker," Benson meant The Shadow. The thought of the mysterious man, who came and went unseen, was annoying to Delmuth. It brought up a most important matter. Delmuth made a sign to Benson. The old man, in turn, motioned to Grady. The hard-faced killer went out of the room, leaving the two plotters alone.
"Benson," declared Delmuth seriously, "we've got to watch out for The Shadow. How he has found out our game is something that puzzles me. The great question is how much he knows.