There were no signal lights along the shore in those days, and no searchlights on the vessels; everything was blind, and on a dark, misty night in a river full of snags and shifting sand-bars and changing shores, a pilot's judgment had to be founded on _absolute certainty_.[27] Under such conditions men were valued only for what they actually could do. There was no entrance into the inner circle of masters of the river save through genuineness and real efficiency. Sentimentalizing and boasting and sham died instantly in that stern atmosphere. To live for four years in daily contact with such men taught one coarseness of speech and an appalling fluency in the use of profanity, but it taught one at the same time to look with supreme contempt upon inefficiency and pretense. The "cub" became at length a pilot, to be entrusted after a time with some of the finest boats on the river. He became very efficient in his hard-learned profession so conspicuously so that he won the commendation even of Bixby, who could say in later years, "Sam Clemens never had an accident either as a steersman or as a pilot, except once when he got aground for a few hours in the _bagasse_ (cane) smoke, with no damage to any one."[28] But the war put a sudden end to the piloting. The river was closed, and in April, 1861, he went reluctantly back to Hannibal. "I loved the profession far better than any I have ever followed since," he declared in his later years, "and I took a measureless pride in it." It is very possible that but for the war and the change which it wrought upon the river, Mark Twain might have passed his whole life as a Mississippi pilot. II After a few weeks in a self-recruited troop that fell to pieces before it could join the Confederate army, the late pilot, now twenty-six years old, started by stage coach across the Plains with his brother Orion, who had just been appointed secretary to the new Governor of Nevada. It was Mark Twain's entry upon what, in college terms, may be called his graduate course. It was six years long and it covered one of the most picturesque eras in the history of Western America. For a few restive months he remained at Carson City as his brother's assistant, then in characteristic fashion he broke away to join the excited tide of gold seekers that was surging through all the mountains of Nevada. During the next year he lived in mining camps with prospectors and eager claim-holders. Luck, however, seemed against him; at least it promised him little as a miner, and when the Virginia City _Enterprise_, to which he had contributed letters, offered him a position on its staff of reporters, he jumped at the opportunity.