"And you, too, pard; don't forget that," retorted the grizzled villain grimly. "I forget nothing," said Mr. Ruggles, giving his plug hat a rub across his left arm. "It isn't pleasant, to say the least, having matters turn out in this way. I wish to see you in regard to this Dyke Darrel." "I'm all ears, pard." "He must never see Chicago again." "Wal?" "I want you to see to it, Nick." "I don't know about that," muttered the grosser villain. "I've shed 'bout enough blood, I reckin." "It is for your own safety that I speak, Nick. No trace of that last work can ever reach me." "Don't be too sure, Darl Ruggles. With Dyke Darrel on the trail, there's no knowing where it'll end. He's unearthed some o' the darkest work ever did in Chicago an' St. Louis. I WOULD breathe a durn sight more comfortable like if Dyke Darrel was under the sod." "So would others." "Yourself, fur instance." "I won't deny it, Nick. I don't feel very comfortable with the young detective free. Between you and me, Nick, I believe we can make this the last trail Dyke Darrel ever follows. A thousand dollars to the man who takes the detective's scalp. That is worth winning, Nick." "Put 'er thar, pard." Nick Brower held out his huge hand and clasped the small white one of the Professor. "I'll win that thousan' or go beggin' the rest o' my days, Darl Ruggles." "I hope you may. You'd best take the next train for the Southwest. I won't be far behind." And then the two separated. A little later Professor Darlington Ruggles stood on the dock overlooking the river and the shipping. Although yet early in the season the big lake was open, and several vessels laden with lumber had entered the river from various ports on the Eastern shore during the day. A tug lay on the further side, and a schooner with bare spars loomed up in the moonlight. "This open sewer has witnessed more thar one crime," mused the Professor. "I would like it if that infernal Dyke Darrel was at the bottom of the river. He has taken into his head to hunt down the men who killed Arnold Nicholson, and if there's a man east of the Mississippi who can ferret out this crime, Dyke Darrel is the one. But I don't mean to permit him to do anything of the kind if I know myself. It's a fight between the detective and as sharp a man as any detective that ever lived. I imagine--hello! who is this?" The last exclamation was caused by the sudden appearance of a dark form coming up over the dock as if from the water. A moment later a man paused within six feet of Professor Ruggles, and penetrated him with a pair of glittering eyes. "What do you want?" It was the Professor who uttered the word, at the same time receding a step or two, for the stranger's glance startled him considerably. "Who are you?" demanded the stranger, shortly. "It does not concern you." "Don't it? We'll see about that."