It is not so difficult to credit Madame Caprell with clairvoyant powers when one has read the letters of Samuel Clemens up to this point. If we may judge by those that have survived, her prophecy of literary distinction for him was hardly warranted by anything she could have known of his past performance. These letters of his youth have a value to-day only because they were written by the man who later was to become Mark Twain. The squibs and skits which he sometimes contributed to the New Orleans papers were bright, perhaps, and pleasing to his pilot associates, but they were without literary value. He was twenty-five years old. More than one author has achieved reputation at that age. Mark Twain was of slower growth; at that age he had not even developed a definite literary ambition: Whatever the basis of Madame Caprell's prophecy, we must admit that she was a good guesser on several matters, “a right smart little woman,” as Clemens himself phrased it. She overlooked one item, however: the proximity of the Civil War. Perhaps it was too close at hand for second sight. A little more than two months after the Caprell letter was written Fort Sumter was fired upon. Mask Twain had made his last trip as a pilot up the river to St. Louis--the nation was plunged into a four years' conflict. There are no letters of this immediate period. Young Clemens went to Hannibal, and enlisting in a private company, composed mainly of old schoolmates, went soldiering for two rainy, inglorious weeks, by the end of which he had had enough of war, and furthermore had discovered that he was more of a Union abolitionist than a slave-holding secessionist, as he had at first supposed. Convictions were likely to be rather infirm during those early days of the war, and subject to change without notice. Especially was this so in a border State. III. LETTERS 1861-62. ON THE FRONTIER. MINING ADVENTURES. JOURNALISTIC BEGINNINGS.