In calm, as in flood, Mark Twain has mastered the river, and has made it his own. Once upon a time the Mississippi called up a vision of the great Gulf opening on the sight of La Salle, "tossing its restless billows, limitless, voiceless, lonely as when born of chaos, without a sail, without a sign of life." Now a humbler image is evoked, and we picture Huck Finn and Jim floating down the broad stream in the august society of the Duke and the Dauphin. Though Mark Twain cultivates the South-Western dialect, and does not disdain the speech of Pike County, there is in his two romances no suspicion of provincialism. Style and imagination give them the freedom of the whole world. They are of universal truth and application. But since the days of Huck Finn and Tom Sawyer the conditions of American literature have changed, and for the worse. As in England, so in America, a wide diffusion of books, an eager and general interest in printed matter, have had a disastrous effect. The newspapers, by giving an improper advertisement to the makers of books, have rendered the literary craft more difficult of pursuit. The ambition of money has obscured the simple end of literature, and has encouraged a spirit of professionalism eminently characteristic of a practical country. We hear of works of fiction sketched in the back-offices of publishers, whose hands are held upon the public pulse. All is arranged, we are told, by the man of business--period, plot, characters. Nothing is left to the novelist but to carry out the instructions of his taskmaster, and when you contemplate the result you can feel no surprise at this composite authorship. It is no better than a money-making partnership, a return to the miserable practices of Grub Street and its hacks, a curiosity of trade, not of art, and so long as its sorry product is distinguished from genuine literature no great harm is done.