In 1882, Mark Twain, who had been living for so many years in the East, revisited the great river of his childhood and youth in order to gather material for his book, "Life on the Mississippi." It was, naturally, a profound and touching experience, and years later he told Mr. Paine what his thoughts and memories had been. He had intended to travel under an assumed name, to pass unknown among those familiar scenes, but the pilot of the steamer _Gold Dust_ recognized him. Mark Twain haunted the pilot-house and even, as in days of old, took his turn at the wheel. "We got to be good friends, of course," he said, "and I spent most of my time up there with him. When we got down below Cairo, and there was a big, full river--for it was high-water season and there was no danger of the boat hitting anything so long as she kept in the river--I had her most of the time on his watch. He would lie down and sleep, and leave me there to dream that the years had not slipped away; that there had been no war, no mining days, no literary adventures; that I was still a pilot, happy and care-free as I had been twenty years before." Was it merely a sentimental regret, however poignant, that Mark Twain recorded in these words, a regret for the passing of time and the charm and the hope of youth? That little note of deprecation regarding his "literary adventures" sets one thinking. It is not altogether flattering to the self-respect of a veteran man of letters! And besides, we say to ourselves, if that earlier vocation of his had been merely "happy and care-free" a man of Mark Twain's energy and power could hardly, in later life, have so idealized it. For idealize it he certainly did: all his days he looked back upon those four years on the Mississippi as upon a lost paradise. "I'd rather be a pilot than anything else I've ever done in my life," he told his old master, Horace Bixby. "I am a person," he wrote to Mr. Howells in 1874, "who would quit authorizing in a minute to go to piloting, if the Madam would stand it." Quite an obsession, we see; and that he had found that occupation deeply, actively satisfying, that it seemed to him infinitely worthy and beautiful is proved not only by the tender tone in which he habitually spoke of it but by the fact that the earlier pages of "Life on the Mississippi," in which he pictures it, are the most poetic, the most perfectly fused and expressive that he ever wrote.