Dr. Mason, a tall, lean Scotchman, lived at North Bloomfield, only nine miles distant, whence he had been summoned to attend a case of _delirium tremens_. The sparkling water of the Sierras is pure and cold, but the gold of the Sierras buys stronger drink. With a fee of two double eagles in his pocket, the doctor could look with charity upon the foibles of human nature. He thoroughly enjoyed the early morning ride among the giant pines. In the open places manzanita ran riot, its waxy green leaves contrasting with the dust-laden asters and coarse grasses by the roadside. Across the canon of the Middle Yuba the yellow earth of old man Palmer's diggings shone like a trademark in the landscape, proclaiming to the least initiated the leading industry of Sierra and Nevada Counties, and marking for the geologist the height of the ancient river beds, twenty-five hundred feet above the Middle Yuba and nearly at right angles to it. Those ancient river beds were strewn with gold. Looking in the other direction, one caught glimpses here and there of the back-bone of the Sierras, jagged dolomites rising ten thousand feet skyward. The morning air was stimulating, for at night the thermometer drops to the forties even in midsummer. In a ditch by the roadside, and swift as a mill-race, flowed a stream of clear cold water, brought for miles from reservoirs up in the mountains. Even Charley Chu, now that he was leaving the gold fields forever, regarded the water-ditch with affection. It brought life--sparkling, abundant life--to these arid hill-tops. Years ago, Charley Chu and numerous other Chinamen had dug this very ditch. What would California have been without Chinese labor? Industrious Chinamen built the railroad over the Sierras to the East and civilization. Doctor, girl and Chinaman were too much occupied with their own thoughts to take much notice of the stage-driver, who, though he assumed an air of carelessness, was, in reality, on the watch for spies and robbers. For the bankers at Moore's Flat, a few miles further on, were planning to smuggle several thousand dollars' worth of gold dust to Nevada City that morning. Mat Bailey was a brave fellow, but he preferred the old days of armed guards and hard fighting to these dubious days when stage-drivers went unarmed to avoid the suspicion of carrying treasure. Charley Chu with his pistol had the right idea; and yet that very pistol might queer things to-day.