"Friend Lewis, thee must not tell such stories to me," said old Elias. "Thee knows I am thy friend, and I have saved thee when a price was on thy head. I know thou art a man of courage, and friend Jonathan Gates, whom some call 'Long Arms,' fears nothing on earth, and I'm fearful nothing anywhere else; and yet thou tellest me that he and thee are scared even almost to death. Shame on thee so to declare before thy friend, who loves ye both as he were thy father!" "No, no, Elias," said Whetzell, dropping into the Quaker speech. "I tell thee no lie. We are scared. Yesterday afternoon we were in hiding about a mile from Dunkard Creek, and in the evening we built a fire under the bank very carefully; and we got some black rocks to prop up a little kettle, and put them beside the fire rather than in it; and the black rocks took fire and burned fiercely, with a filthy smoke and a bright light; and Long Arms said the devil would come if we stayed; and we grabbed the kettle and poured out the water, and made our way here, leaving the black rocks to burn." Elias Blank was much interested. He did not tell Whetzell what the black rocks were, but he found out exactly where the men had made their fire, and the next day hunted up the camping-ground, found the "black rocks" in one of the river-hills, and opened a coal bank. Thus, a little here and a little there, coal was discovered and used. At first it was mingled with wood, and then burned alone on the hearth. This coal was easily kindled, for it was bituminous or soft; it was not necessary to provide an extra draft, or to spend much more time in lighting it than had been customary with wood. Not many years passed, however, before a variety of coal was found that was hard and would not kindle easily. Accordingly it was thrown aside as useless. This was anthracite coal, and it is now generally preferred to the bituminous because of this very quality. Being hard, it does not burn away so rapidly; besides, it needs less attention and gives out much less smoke. Just before the Revolution, Obadiah Gore, a blacksmith in the Wyoming valley in Pennsylvania, tried hard coal in his forge. At first, even with his great bellows, he was unable to make it burn. He continued the experiment, however, and after a time the lumps began to yield and flames darted from them. He thus discovered that pieces of anthracite coal could be kindled and burned if there was a "strong current of air," as he said, "sent through them by the bellows; without that I could do nothing with them."