You will not find this letter until just before the meeting. I have just been to see Berger. He will commit suicide. He was about to betray us. Watch Harry Vincent, who lives at the Hotel Metrolite. He is an enemy.
A strange, cryptic sign appeared at the bottom of the note. Prokop knew that it had come from the Red Envoy. That mysterious individual had come unknown to the apartment, last night and had left this message.
Prokop added it to the papers which he had just written. He thrust the entire lot into his pocket, and donned an overcoat. Then he left the apartment.
After walking several blocks, Prokop hailed a taxicab. It took him to a corner near an elevated station. He took the “L,” and rode a few stops onward.
Reaching the street, he again utilized a cab for a distance of half a mile. He left it at the corner of a side street. After the vehicle had driven on, Prokop looked about him.
Then, sure that he was not being observed, he went down the street, and turned suddenly along a walk that led between two warehouses. He reached the back of an old house, and entered a basement door.
Moving through the darkness, the man arrived in a small room. There he lighted an oil lamp. The cellar room was windowless.
Prokop went to a corner, and removed a few boxes that were filled with tin cans and pieces of junk. Under them was an old box with a hinged top. He opened it, and drew out a dozen black hooded robes.
He donned one of these, and the masklike front fell before his face, leaving only two eye holes to see through.
With his identity thus concealed, Prokop reached under his robe, and drew a small red tag from his coat pocket. He pinned this to the left sleeve of the robe which enveloped him.