Out upon the roof, in the drenching rain, the boy stepped, and made his way fearlessly along the dizzy hight, followed by Captain Daly and his men, who stepped with the greatest caution, for they realised their deadly peril at a glance.

Fearlessly the brave boy led the police captain and his men, the chief calling out: "Go slow, Will, for a false step here will send us to perdition!"

Reaching the chimney, Will sprang upon the top and disappeared in the interior, the others following, and descending the iron ladder in silence.

Down to the fire-place went Will, and the instant after Captain Daly joined him, and handing the boy his dark-lantern to spring open, the two hastily sprang out into the room.

It was deserted, but the door was partly open, for the lock had been wrenched off.

The pictures were on the wall, the bed all rumpled up, and the lamp was upon the table, while there was every indication of a hasty departure, as in the assembly room.

Then the police went on a voyage of discovery through the house.

It was an old-time mansion, two stories, narrow in build, and ran back against the one on the other street, to which the false chimney belonged, and in it were some half-score of poor, but reputable lodgers, who, aroused by the police, were amazed at the raid upon them.

In answer to inquiries, they said that the room on the rear, through which the officers had come, was occupied by an artist, they had heard, though no one seemed to know much about him except that he had a number of visitors.

That there was a secret connected with his living there they had not suspected.