“Meantime a peep into the next room might help me towards solving the mystery. Setting the bottle and glass aside, I dragged the table across the floor, placed it under the lighted window, mounted, and was about to peer through, when the light in that apartment was put out also. Angry and overwhelmed, I leapt down, and, stretching out my hands till they touched the wainscoting, I followed the wall around till I came to the knob of the door, which I frantically clutched. But I did not turn it immediately, I was too anxious to catch these villains at work. Would I be conscious of the harm they meditated against me, or would I imperceptibly yield to some influence of which I was not yet conscious, and drop to the floor before I could draw my revolver or put to my mouth the whistle upon which I de-pended for assistance and safety? It was hard to tell, but I determined to cling to my first intention a little longer, and so stood waiting and counting the minutes, while wondering if the captain of the police boat was not getting impatient, and whether I had not more to fear from the anxiety of my friends than the cupidity of my foes. “You see I had anticipated communicating with the men in this boat by certain signals and tokens which had been arranged between us. But the lack of windows in the room had made all such arrangements futile, so I knew as little of their actions as they of my sufferings; all of which did not tend to add to the cheerfulness of my position. “I, however, held out for a half-hour, listening, waiting and watching in a darkness which, like that of Egypt, could be felt, and when the suspense grew intolerable I struck a match and let its blue flame flicker for a moment over the face of my watch. But the matches soon gave out and with them my patience, if not my courage, and I determined to end the suspense by knocking at the door beneath. “This resolution taken, I pulled open the door before me and stepped out. Though I could see nothing, I remembered the narrow landing at the top of the stairs, and, 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.