Around the outside of the case was a piece of paper, held in place by a rubber band. Kip removed the rubber band, unrolled the paper, studied it in match light. On the paper was penciled the name "Delancy" followed by the words, "Second floor rear at end of fire escape, sixty-eight A Seventh Avenue." At the bottom of the paper was that crude drawing, the sign of the Eye. Kip's pulse quickened. Could it be that Carlson was the Eye? Certain here was a message which Carlson had delivered and which carried the Eye's signature. And the flashlight device--Kip understood its construction and purpose immediately. Inside the case was some sort of a trigger mechanism operated by a button on the outside. The trigger operated a narrow strip of film, perhaps eight millimeter film, on which were photographed the messages which the Eye intended to send. This film would be placed between the light globe and the lens, so that the photographed message could be projected on any wall from a long distance. This was the device which had been used tonight at the Weedham home. Someone on the outside, probably the lady with the green eyes, Vida Gervais, had employed the light beam projected message. That warning which seemed to have been intended for Carlson was probably no warning at all. Perhaps the police had been keeping rather a sharp eye on Carlson, and Carlson had decided to put himself in the clear by faking that little scene at the Weedham's and pretending that the Eye intended to kill Carlson. "And that would be suicide, I'd be willing to bet my last dollar!" Kip muttered grimly. He replaced the light signal device in the milk box together with the note which was attached to the copper case. He would await further developments. Carlson was the Eye, he was certain. It was now the job of the Black Hood to catch Carlson red-handed. * * * * * He left the narrow corridor between buildings to take up a post on the other side of the street. He did not have to wait very long until a man in the garb of a telegraph messenger came up the street. The messenger looked both ways and finally turned up that sidewalk between the two tenements. Even from where he stood, Kip Burland could hear the rattle of the milk box top. A moment later, the messenger appeared. He was carrying that self-same copper cased flashlight device. It was a tangled trail that Kip Burland followed that night, shadowing that man who wore a telegraph messenger's costume. From half a block behind the man, Kip watched the messenger walk along side of the bleak walls of Tombs prison. He saw the narrow ray of that signal beam reach out and up to one of the narrow, barred windows. The Eye was signaling to someone who was even now in the hands of the police!