I have been a quartz miner in the silver regions--a pretty hard life; I know all the palaver of that business: I know all about discovery claims and the subordinate claims; I know all about lodes, ledges, outcroppings, dips, spurs, angles, shafts, drifts, inclines, levels, tunnels, air-shafts, "horses," clay casings, granite casings; quartz mills and their batteries; arastras, and how to charge them with quicksilver and sulphate of copper; and how to clean them up, and how to reduce the resulting amalgam in the retorts, and how to cast the bullion into pigs; and finally I know how to screen tailings, and also how to hunt for something less robust to do, and find it. I know the _argot_ of the quartz-mining and milling industry familiarly; and so whenever Bret Harte introduces that industry into a story, the first time one of his miners opens his mouth I recognize from his phrasing that Harte got the phrasing by listening--like Shakespeare--I mean the Stratford one--not by experience. No one can talk the quartz dialect correctly without learning it with pick and shovel and drill and fuse. I have been a surface-miner--gold--and I know all its mysteries, and the dialect that belongs with them; and whenever Harte introduces that industry into a story I know by the phrasing of his characters that neither he nor they have ever served that trade. I have been a "pocket" miner--a sort of gold mining not findable in any but one little spot in the world, so far as I know. I know how, with horn and water, to find the trail of a pocket and trace it step by step and stage by stage up the mountain to its source, and find the compact little nest of yellow metal reposing in its secret home under the ground. I know the language of that trade, that capricious trade, that fascinating buried-treasure trade, and can catch any writer who tries to use it without having learned it by the sweat of his brow and the labor of his hands. I know several other trades and the _argot_ that goes with them; and whenever a person tries to talk the talk peculiar to any of them without having learned it at its source I can trap him always before he gets far on his road.