you to," laughed the other. "I only asked why you didn't?"
"Because," said Derrick, "I want him to become fond of me, and my mother says the most stubborn animals can be conquered by kindness, while beatings only make them worse."
"Which is as true as gospel," said the mine boss. "Well, the only other thing I can suggest is for you to go into the stable, get the harness that hangs on the peg nearest the door, and put it on him."
Acting upon this hint, Derrick had hardly finished buckling the last strap of the harness when the mule began to move steadily forward of his own accord.
"That's his way," said the mine boss. "In harness he knows that he is expected to work, but without it he thinks he may do as he pleases."
Presently the mule stumbled slightly, and again he stopped and refused to go ahead.
"Do you know what is the matter now, sir?" asked Derrick.
"I think perhaps he wants his lamp lighted," replied the mine boss.
A miner's lamp, attached to a broad piece of leather, hung down in front of the mule from his collar.
The boy lighted this lamp, and immediately the mule began to move on, showing that this was exactly what he had wanted.
"Seems to me he knows almost as much as folks," cried Derrick, highly delighted at this new proof of his mule's intelligence.
"Quite as much as most folks, and more than some," answered his companion, dryly.
During their long walk they passed through several doors which, as Derrick was told, served to regulate the currents of air constantly flowing in and out of the mine, and kept in motion by the great fan at its mouth. Whenever they approached one of these the mine boss called, loudly, "Door," and it was immediately opened by a boy who sat behind it and closed it again as soon as they had passed. Each of these boys had besides his little flaring lamp, such as everybody in the mine carried, a can of oil for refilling it, a lunch-pail and a tin water-bottle, and each of them spent from eight to ten hours at his post without leaving it.
Finally Derrick and the mine boss came to a junction of several galleries, a sort of mine cross-roads, and the former was told that this was to be his headquarters, for here was where the trains were made up, and from here the empty cars were distributed. At the farther end of each of the headings leading from this junction two or more miners were at work drilling, blasting, and picking tons of coal from between its enclosing walls of slate. They were all doing their best to fill the cars which it was Derrick's business to haul to the junction and replace with empty ones. There were also a number of miners at work in breasts, or openings at the sides of the gangways that followed the slant of the coal vein, who expected to be supplied with empty cars and have their loaded ones taken away by Derrick. These breast miners filled their cars very quickly, as the moment they loosened the coal it slid down the slaty incline, above which it had been bedded, to a wooden chute on the edge of the gangway that discharged it directly into them.
As Derrick was told of all this, he realized that he and Harry Mule would have to get around pretty fast to attend to these duties, and supply empty cars as they were needed.
What interested him most in this part of the mine was an alcove hewn from solid rock near the junction, in which was a complete smithy. It had forge, anvil, and bellows, and was presided over by a blacksmith named Job Taskar, as ugly a looking fellow, Derrick thought, as he had ever seen. Here the mules were shod, tools were sharpened, and broken iron-work was repaired. It was a busy place, and its glowing forge, together with the showers of sparks with which Job Taskar's lusty blows almost constantly surrounded the anvil, made it appear particularly cheerful and bright amid the all-pervading darkness. Nearly every man and boy in that section of the mine was obliged to visit the smithy at least once during working hours. Thus it became a great news centre, and offered temptations to many of its visitors to linger long after their business was finished.
After pointing out to Derrick the several places at which his services would be required, the mine boss left him, and the boy found himself fully launched on his new career.
He soon discovered that Harry Mule knew much more of the business than he did, and by allowing him to have his own way, and go where he thought best, Derrick got along with very few mistakes. Among the miners upon whom he had to attend he found brawny Tom Evert, stripped to the waist, lying on his side, and working above his head, but bringing down the coal in glistening showers with each sturdy blow of his pick. When he saw Derrick he paused in his work long enough to exchange a cheery greeting with him and to dash the perspiration from his eyes with the back of his grimy hand; then at it he went again with redoubled energy.
At the end of one of the headings Derrick found another acquaintance in the person of Monk Tooley. He scowled when he saw the new driver, and growled out that he'd better look sharp and see to it he was never kept waiting for cars, or it would be the worse for him.
Twice Derrick started to leave this place, and each time the miner called him back on some trivial pretext. The boy could not see, nor did he suspect, what the man was doing, but as he turned away for the third time, Monk Tooley sprang past him with a shout, and ran down the heading. Derrick did not hear what he said, but turning to look behind him, he saw a flash of fire, and had barely time to throw himself face downward, behind his car, when he was stunned by a tremendous explosion. Directly afterwards he was nearly buried beneath an avalanche of rock and coal.
CHAPTER V
ATTACKED BY ENEMIES, AND LOST IN THE MINE
Although Derrick was terribly frightened by the explosion, and considerably bruised by the shower of rocks and coal that followed it, the car had so protected him that he was not seriously hurt. Had his mule started forward the heavily loaded car must have run over and killed him. Fortunately Harry was too experienced a miner to allow such a trifling thing as a blast to disturb his equanimity, especially as the two false starts already made had placed him at some little distance from it. To be sure, he had shaken his head at the flying bits of coal, and had even kicked out viciously at one large piece that fell near his heels. The iron-shod hoof had shattered the big lump, and sent its fragments flying over Derrick, but in the darkness and confusion the boy thought it was only part of the explosion, and was thankful that matters were no worse.
As Derrick cleared himself from the mass of rubbish that had fallen on him, and staggered to his feet, he was nearly suffocated by the dense clouds of powder-smoke from the blast. He was also in utter darkness, both his lamp and that of Harry Mule having been blown out. In his inexperience he had not thought to provide matches before entering the mine, and now he found himself in a darkness more dense than any he had ever dreamed of, without any means of procuring a light. His heart grew heavy within him as he realized his situation, for he had no idea whether the miner who had played so cruel and dangerous a trick upon him would return or not.
An impatient movement on the part of Harry Mule suggested a plan to him. Casting off the chain by which the mule was attached to the car, and holding the end in his hand, he said, "Go on, Harry, and take me out of this place." At this command the intelligent animal started off towards the junction as unhesitatingly as though surrounded by brightest daylight, and Derrick followed.
They had not gone far before they met Monk Tooley, leisurely returning to the scene of his labors.
"Hello! Mr. Mule-driver," he shouted, "what are you a-doing here in de dark, an' how do yer like mining far as ye've got? Been studying de effect of blarsts, and a-testing of 'em by pussunal experience?"
Derrick felt a great lump rising in his throat, and bitter thoughts and words crowded each other closely in his mind. He knew, however, that the man before him was as greatly his superior in wordy strife as in bodily strength, so he simply said,
"The next time you try to kill me you'd better take some surer means of doing it."
"Kill you! Who says I wanted to kill you?" demanded the miner, fiercely, as he stopped and glared at the boy. "Didn't I holler to ye to run? Didn't I give yer fair warnin' that I was shootin' a blarst? Didn't I? Course I did and yer didn't pay no 'tention to it. Oh no, sonny! 'twon't do. Ye mustn't talk 'bout killin' down in dese workin's, cause 'twon't be 'lowed. Come back now, an' git my wagon. Here's a light