He did not walk past the Jones's house, nor hesitate before ringing the door-bell on this occasion, as he had the evening before, but stepped up to it with all the boldness of one who was about to meet and greet old acquaintances. Besides, his mind was too full of the sad fate that had befallen his mule to admit of more than the briefest consideration of personal feelings. At the supper-table the conversation was wholly of mines, collieries, and the perils of miners' lives, in regard to which Mr. Jones related a number of interesting incidents. "How wonderful it is!" said Miss Nellie, who had listened to all this with eager attention. "Who first discovered coal, anyway, Uncle Warren? and how did people find out that it would burn?" "If you mean who discovered anthracite coal, I believe the credit is generally given to a man named Philip Gunter, who lived in a cabin on the side of a mountain not far from where we are now sitting. He was a hunter; and the story goes that one day in the year 1791 he had been out hunting for many hours, without securing any game, which made him feel very badly, for when he left home that morning there was no food in the house. Towards night he was returning, greatly depressed in spirits, and paying so little heed to his footsteps that he stumbled and fell over some obstacle. Stooping to see what it was, he found a black stone, different from any he had ever before noticed. He had, however, heard of stone coal, and thought perhaps this might be a lump of that substance. Having nothing else to carry, he decided to take it home as a curiosity. Soon afterwards he gave it to a friend, who sent it to Philadelphia, where it was pronounced to be genuine coal. A few gentlemen became interested in this discovery, and formed themselves in the 'Lehigh Coal-mine Company.' A mine was opened, and four laborers were employed to work it; but as there was no way of getting the coal they mined to market they were soon discharged, and the project was abandoned for the time being. "Nothing further was done until 1817, when Colonel George Shoemaker, of Pottsville, took four wagon-loads of anthracite coal to Philadelphia, and tried to sell it there. People laughed at him for telling them that those black stones would burn; but he guaranteed that they would. Upon this a number of persons bought small quantities on trial; but all their efforts failed to set it on fire. Then they became very angry, and tried to have Colonel Shoemaker thrown into prison for cheating them. He fled from the city, pursued by officers who held warrants for his arrest. Finally he managed to elude them, and reached his home, thoroughly disgusted with coal, and ready to swear that he would have nothing more to do with it.