stretching out my arms, I felt for the boarding on either hand, guilding myself by it, and began to descend, when something rising, as it were, out of the cavernous darkness before me made me halt and draw back in mingled dread and horror.

"But the impression, strong as it was, was only momentary, and, resolved to be done with the matter, I precipitated myself downward, when suddenly, at about the middle of the staircase, my feet slipped and I slid forward, plunging and reaching out with hands whose frenzied grasp found nothing to cling to, down a steep inclined plane—or what to my bewildered senses appeared such,—till I struck a yielding surface and passed with one sickening plunge into the icy waters of the river which in another moment had closed dark and benumbing above my head.

"It was all so rapid I did not think of uttering a cry. But happily for me the splash I made told the story, and I was rescued before I could sink a second time.

"It was a full half hour before I had sufficiently recovered from the shock to relate my story. But when once I had made it known, you can imagine the gusto with which the police prepared to enter the house and confound the obliging host with a sight of my dripping garments and accusing face. And indeed in all my professional experience I have never beheld a more sudden merging of the bully into a coward than was to be seen in this slick villain's face, when I was suddenly pulled from the crowd and placed before him, with the old man's wig gone from my head, and the tag of blue ribbon still clinging to my wet coat.

"His game was up, and he saw it; and Ebenezer Gryce's career had begun.

"Like all destructive things the device by which I had been run into the river was simple enough when understood. In the first place it had been constructed to serve the purpose of a stairway and chute. The latter was in plain sight when it was used by the sailmakers to run the finished sails into the waiting yawls below. At the time of my adventure, and for some time before, the possibilities of the place had been discovered by mine host, who had ingeniously put a partition up the entire stairway, dividing the steps from the smooth runway. At the upper part of the runway he had built a few steps, wherewith to lure the unwary far enough down to insure a fatal descent. To make sure of his game he had likewise ceiled the upper room all around, including the enclosure of the stairs. The door to the chute and the door to the stairs were side by side, and being made of the same boards as the wainscoting, were scarcely visible when closed, while the single knob that was used, being transferable from one to the other, naturally gave the impression that there was but one door. When this adroit villain called my attention to the little window around the corner, he no doubt removed the knob from the stairs' door and quickly placed it in the one opening upon the chute. Another door, connecting the two similar landings without, explains how he got from the chute staircase into which he passed, on leaving me, to the one communicating with the room below.

"The mystery was solved, and my footing on the force secured; but to this day—and I am an old man now—I have not forgotten the horror of the moment when my feet slipped from under me, and I felt myself sliding downward, without hope of rescue, into a pit of heaving waters, where so many men of conspicuous virtue had already ended their valuable lives.

"Myriad thoughts flashed through my brain in that brief interval, and among them the whole method of operating this death-trap, together with every detail of evidence that would secure the conviction of the entire gang."