They entered the hill by a natural opening under a huge rock, where a little stream rushed out. They followed its course for a few yards, when the passage took a turn, and sloped steeply into the heart of the hill. With many angles and windings and branchings off, and sometimes with steps where it came upon a natural gulf, it led them deep into the hill before they arrived at the place where they were at present digging out the precious ore. This was of various kinds, for the mountain was very rich with the better sorts of metals. With flint and steel, and tinder box, they lighted their lamps, then fixed them on their heads, and were soon hard at work with their pickaxes and shovels and hammers. Father and son were at work near each other, but not in the same _gang_--the passages out of which the ore was dug, they called _gangs_--for when the _lode_, or vein of ore, was small, one miner would have to dig away alone in a passage no bigger than gave him just room to work--sometimes in uncomfortable cramped positions. If they stopped for a moment they could hear everywhere around them, some nearer, some farther off, the sounds of their companions burrowing away in all directions in the inside of the great mountain--some boring holes in the rock in order to blow it up with gunpowder, others shoveling the broken ore into baskets to be carried to the mouth of the mine, others hitting away with their pickaxes. Sometimes, if the miner was in a very lonely part, he would hear only a tap-tapping, no louder than that of a woodpecker, for the sound would come from a great distance off through the solid mountain rock.