Warren Jones, the assistant superintendent, or, as he was generally termed, the "mine boss," of the Raven Brook Colliery, was a pleasant-faced, outspoken young man of about thirty. At present he was acting as superintendent, and the burden of responsibility bore heavily upon him. He had a host of warm friends, but had made some bitter enemies among the miners by his direct honesty of purpose and determination to deal out even-handed justice to all over whom he exercised authority. Although generally good-natured and slow to find fault, he could be quick and stern enough when occasion demanded. Such was the man who greeted Derrick Sterling cordially that evening, showed him into his library, and made him sit down, saying that he wished to have a little talk with him. He spoke in terms of such praise of Derrick's behavior on the previous day as to bring a blush of pleasure to the boy's cheeks. "By-the-way, Derrick," he asked, "how did the breaker catch fire?" "I haven't the least idea, sir," answered Derrick, looking up in surprise. "Oh, all right," said the other, carelessly. "I didn't know but what you might have heard something said about it." "No, sir, I haven't; that is, not anything that I thought amounted to anything. I have heard some of the boys talking about 'Mollies,' and saying that they beat the world for floods and fires. What are 'Mollies' anyway, Mr. Jones?" The mine boss looked at him curiously for a moment before replying, "If you really don't know, it's time you did, for you're likely to see and hear a great deal of them if you decide to make mining your business in life. All that I know about them is this: "Many years ago a young woman named Mary, or Mollie Maguire, was murdered in Ireland, and several young fellows belonging to an order called 'Ribbonmen' bound themselves by an oath to avenge her death and kill her murderer. They succeeded so well in this undertaking, and escaped detection so easily, that they proceeded to redress other wrongs, real and fancied. They were joined by other men of their own way of thinking, and finally they became a widely spread and powerful society. In course of time, whenever anybody was mysteriously killed in Ireland, it came to be said that the Mollie Maguires had done it, and so the name clung to them. "At last the murderous order was introduced into this region by some Irish miners who wished to get rid of an objectionable overseer, and also to control the labor unions among the miners. It has so spread that now its members are known to exist in every mining community of the anthracite country. It is one of the most cowardly organizations ever formed by men, and one of the most cruel. Its victims are given no warning of the fate in store for them, but are struck down in the dark, or from an ambush, by unseen hands.