It wasn't long before he heard the footsteps of the messenger crunching along the alley. The man came to a stop within a few feet of the very post to which Black Hood was clinging. He pointed the copper cased flashlight device upward toward the dark window which Black Hood was watching. The white ray stabbed out through the darkness, and Black Hood could clearly see the brand of the Eye, projected on the ceiling of the room across the alley. The light beam lingered for a moment, then went out. The shadowy figure of a man appeared at the window. A cigarette glowed in his lips. A signal, Black Hood wondered? And then the figure in the window withdrew and the light beam again shot up from below. This time the words of the Eye's message were clearly projected onto the ceiling of the crimester's hideout. Black Hood read: "Delancy, come to headquarters at once." And then the beam of light went out. Black Hood altered his position slightly so that he clung to the pole with one hand, his body poised for a leap. The faint rustle of the Black Hood's cape caused the messenger on the ground to look up. Black Hood knew that he had to act fast. That signaling device which the messenger carried was an important piece of evidence. Jack Carlson's finger prints would be on the case. That, together with the photo film which carried the Eye's message and was enclosed in the trigger mechanism of the novel projector, constituted evidence that would prove that Jack Carlson was the Eye. Black Hood sprang out from the pole, swooped down upon the messenger like a huge black bat. The man turned to flee too late. Black Hood caught him by the coat tails, dragged him back. The messenger turned, grappled with Black Hood. Then followed one of those grim, silent struggles, too deadly serious for oaths and threats. Rat this pawn of the Eye may have been, but even a cornered rat will fight with the courage of a lion. Time after time the man tried to bash Black Hood's skull with the copper cased signal device--tried once too often; for Black Hood's gauntlet covered fingers closed like steel hooks upon the device. A twist, a sudden jerk, and it was Black Hood who had the signal device now. The copper cylinder gone, the messenger's courage seemed to have gone with it. He turned, fled like a frightened rabbit up the alley and into the avenue. Again Black Hood was faced with one of two choices. He might follow the messenger, might catch him, turn him over to the cops. But in all probability, the messenger knew less about the identity of the Eye than Black Hood knew. He was merely a tool in the hands of a master criminal. And Black Hood was after that master criminal. The second choice, and the one which he decided to take, was to follow Delancy who had been given orders from the Eye to appear at the headquarters of the mob immediately. And in as much as Black Hood had not the slightest idea where the Eye had his headquarters, this was the wisest course to pursue.