into which I stepped, but presently I was able to distinguish the vague outlines of an oyster bar in the distance, and the motionless figures of some half dozen men, whose movements had been arrested by my sudden entrance. For an instant this picture remained; then the drinking and card-playing were resumed, and I stood, as it were, alone on the sanded floor near the door. Improving the opportunity for a closer inspection of the place, I was struck by its picturesqueness. It had evidently been once used as a ship chandlery, and on the walls, which were but partly plastered, there still hung old bits of marlin, rusty rings and such other evidences of former traffic as did not interfere with the present more lucrative business.

"Below were the two bars, one at the right of the door, and the other at the lower end of the room near a window, through whose small, square panes I caught a glimpse of the colored lights of a couple of ferry boats, passing each other in midstream.

"At a table near me sat two men, grumbling at each other over a game of cards. They were large and powerful figures in the contracted space of this long and narrow room, and my heart gave a bound of joy as I recognized on them certain marks by which I was to know friend from foe in this possible den of thieves and murderers.

"Two sailors at the bar were bona fide habitués of the place, and so I judged to be the one or two other specimens of water-side character whose backs I could faintly discern in one of the dim corners. Meantime a man was approaching me.

"Let me see if I can describe him. He was about thirty, and had the complexion and figure of a consumptive, but his eye shone with the yellow glare of a beast of prey, and in the cadaverous hollows of his ashen cheeks and amid the lines about his thin drawn lips there lay for all his conciliatory smile, an expression so cold and yet so ferocious that I spotted him at once as the man to whose genius we were indebted for the new scheme of murder which I was jeopardizing my life to understand. But I allowed none of the repugnance with which he inspired me to appear in my manner, and, greeting him with half a nod, waited for him to speak. His voice had that smooth quality which betrays the hypocrite.

"'Has the gentleman an appointment here?' he asked, letting his glance fall for the merest instant on the lapel of my coat.

"I returned a decided affirmative. Or rather, I went on, with a meaning look he evidently comprehended, 'my son has, and I have made up my mind to know just what deviltry he is up to these days. You see I can make it worth your while to give me the opportunity.'

"'O, I see,' he assented with a glance at the pocketbook I had just drawn out. 'You want a private room from which you can watch the young scapegrace. I understand, I understand. But the private rooms are above. Gentlemen are not comfortable here.'

"'I should say not,' I murmured, and drew from the pocketbook a bill which I slid quietly into his hand. 'Now take me where I shall be safe,' I suggested, 'and yet in full sight of the room where the young gentlemen play. I wish to catch him at his tricks. Afterwards——'

"'All will be well,' he finished smoothly, with another glance at my blue ribbon. 'You see I do not ask you the young gentleman's name. I take your money and leave all the rest to you. Only don't make a scandal, I pray, for my house has the name of being quiet.'

"'Yes,' thought I, 'too quiet!' and for an instant felt my spirits fail me. But it was only for an instant. I had friends about me and a pistol at half cock in the pocket of my overcoat. Why should I fear any surprise, prepared as I was for every emergency?

"'I will show you up in a moment,' said he; and left me to put up a heavy board-shutter over the window opening on the river. Was this a signal or a precaution? I glanced towards my two friends playing cards, took another note of their broad shoulders and brawny arms, and prepared to follow my host, who now stood bowing at the