After carefully oiling the lock of the door connecting the two rooms, he easily shoved back the bolt.

Then, opening the door, he quietly stepped into the room.

The word “surprised” will fail to describe the astonishment of the three persons.

“What means this intrusion, sir?” asked the broker, angrily.

“Where have I seen that young fop before?” was the question Greer put to himself.

“I dropped in to have a chat,” said Nick, seating himself in a chair near the door opening on the hall; he had locked the door of the apartment he had just left and the key was in his pocket; “I accidentally overheard your conversation.”

The two started as if they had been bitten by an adder.

“How dare you?” cried Elmer, approaching the officer in a threatening manner.

“Don’t come so close, please,” said Nick; “I dislike familiarity. There were some things you did not explain quite as clearly as I would have them.”

“What do you mean? are you a madman?” said the broker, quaking with fear. “Leave this room or I will call for help and have you put out.”