"Only one day, sir," replied Derrick laughing, "but I think he's very fond of me, and I know I am of him."
"All right; if you insist upon it, you shall go down again to-morrow to your bumping-mule. Now I want to talk to you seriously."
The conversation that followed was long and earnest, and it was ended by Mr. Jones saying, just before he left, "I must manage somehow or other to be there on the 27th, and I want you to go with me, for I don't know anybody else whom I dare trust. It only remains for us to discover a way."
CHAPTER VIII
DERRICK STERLING'S SPLENDID REVENGE
The new breaker, in which Paul Evert now worked as a slate-picker, was in general appearance very much like the old one, but its interior arrangement was different, and of such a nature as to make life much easier for those who worked in it. The greatest improvement was the introduction of a set of machines called "jigs." The coal from the mine, after being drawn to the very top of the breaker, first passed between great spiked rollers, or "crushers;" then through a series of "screens," provided with holes of different sizes, that separated it into several grades of egg, stove, nut, pea, buckwheat, etc. From the screens it was led into the jigs. These are perforated iron cylinders set in tubs of water, and fitted with movable iron bottoms placed at a slight angle. A small steam-engine attached to each machine raises and lowers or "jigs" this iron bottom a few inches each way very rapidly. The contents of the cylinders are thus constantly shaken in water, and as the slate is heavier than the coal, most of it settles to the bottom, and is carried off through a waste chute. The wet coal runs out through other chutes placed a little higher than that for slate, and extending down through the length of the breaker to the storage bins at its bottom. Along these chutes in the new breaker, as in the old one, sat rows of boys picking out the bits of slate that had escaped the jigs, and among them was Paul Evert.
When Derrick Sterling entered the new breaker on the afternoon of the day following that which had brought such memorable adventures, he was surprised at the comparative absence of coal-dust. It still rose in clouds from the crushers and screens, but there was none above the chutes. He understood the theory of jigs, but had never seen them at work, and now he was so greatly interested in watching them as almost to forget the errand on which he had come. It was only when Mr. Guffy spoke to him that he thought of it, and handed the breaker boss the note he had come to give him.
"All right," said the boss reading it. "I'm sorry to lose him, for he is a quiet, steady lad, and, could in time be made very useful as a picker. I doubt, though, if his back would hold out long at the work. Yes, you may take him along now if you want to."
Stepping over to where his friend sat, Derrick said, "Come, Paul, you're not to work any more to-day; I want to have a talk with you outside."