The girls having grown somewhat fatigued by this time, Addison and I left them at the rose quartz ledges, and went on more rapidly, to search for other minerals. We climbed higher up the mountain side, then went back and forth for nearly an hour. At last we came to the place he was in search of, a long crevice extending up and down the rough face of a ledge which rose almost perpendicularly to a height of forty feet. The crevice was only wide enough to thrust in one's fingers and seemed to be lined with large, hexagonal crystals, as clear as water. The points of these crystals, which had beautiful facets, jutted out past each other in many places, and seemed to match together like teeth in opposed jaws. Still higher up in the same ledges, there were scores of quartz veins, converging and crossing each other in a network; and in some of this white quartz there were minute, bright, yellow specks which Ad said was gold. He thought that there was both gold and silver in this ledge, and that if the top were blasted off, the quartz beneath would be found still richer in these precious metals;--that being the theory of mining engineers, as he had heard his father explain it. After we had looked it over for a time, I went back to conduct the girls to the place; and with half an hour of hard climbing, they arrived at the foot of the crag. Immediately then we discovered Addison, laboriously at work, attempting to break out fragments containing the crystals, by beating on the adjacent rock with a large stone. He had already succeeded in crushing off some of the crystals; but he ruined far more of the handsome points than he secured whole. "Oh, aren't they beautiful!" was Theodora's first exclamation. "Do let's get a lot of them!" "Is this what the hunters call the 'diamond ledge?'" Catherine asked. "Yes," replied Addison, "but of course these crystals are only of quartz and by no means very valuable, save to put in collections of minerals. They are nothing but quartz rock." "But they are very pretty," said Kate. "I would like to get a lot of them to set around our front doorstep." "If only we had drills and a hammer, with a few pounds of gunpowder, we could throw out handsome specimens!" exclaimed Addison. "Sometime, let's get some tools and come up here. Who knows what lovely ones there may be deeper down in the crevice!" As he was speaking, we heard a distant halloo, away to the north of us. "That's Tom and Willis," said I. "They're coming round this way." We answered their shouts and soon heard another halloo. "They'll find us now," said Addison. "Let's spread our luncheon down here in the shadow of the crag," said Theodora.