"So do I hope so with all my heart, Derrick," said the mine boss, gravely; "for I am inclined to think that if you have anything else to tell me it will be something very serious and unpleasant. Now you may take this order for a pair of rubber boots and a miner's cap and lamp over to the store and get the things. Be on hand to go down with the first gang of the morning shift. You will find me in the mine, and I will see that you are properly set to work. Good-night." "Good-night," answered Derrick, as, with the store order in his hand, and his mind full of conflicting emotions, he left the house. Several miners of the day shift were in the store when Derrick went to present his order. By questioning him as to what he wanted with mine clothes, they soon learned that he was to begin life underground the next day as driver of a bumping-mule. "De young bantam'll find it a tougher job than riding empty cars down de slope," sneered one big ugly-looking fellow, whose name was Monk Tooley, and who was Bill Tooley's father. "I reckon you've laid in a big supply of cuss-words as a stock in trade! Eh, lad?" asked another. "No, I haven't," said Derrick, flushing hotly. "I don't believe in swearing, and if I can't drive a mule without it I won't drive him at all." "Then I reckon you'll hunt some other business putty quick," answered the miner with a coarse laugh in which the others joined. "Mules won't work without they hears the peculiar langwidge they's most fond of." "Well," said Derrick, "we'll see." And leaving the store with his purchases he started homeward. On the way he stopped to deliver Mr. Guffy's message to Paul Evert, and to tell his friend the great news that on the following day he was to begin the life of a miner. "I wish I was going with you," said Paul. "I wish you were, Polly," answered Derrick. "Perhaps there will be a chance for you down there before long, and by that time I will have learned all the ropes, and can tell you what's what." Although Derrick had lived much among collieries, he had never been allowed to go down into a mine. His parents had kept him as much as possible from associating with the rough mine lads of the village. Thus, until he went into the breaker to earn his own living, he had held but slight intercourse with them. His friend Paul, being the son of a miner, knew far more of underground life than he, and often smiled at his ignorance of many of the commonest mine terms. Derrick was a peculiar boy in one respect. He disliked to ask questions, and would rather spend time and patience in finding out things for himself, if it were possible for him to do so. What he thus learned he never forgot.