It was because of the Sellers characteristics in him that he invested in a typesetting-machine which cost him nearly two hundred thousand dollars and helped to wreck his fortunes by and by. It was because of this characteristic that he invested in numberless schemes of lesser importance, but no less disastrous in the end. His one successful commercial venture was his association with Charles L. Webster in the publication of the Grant Memoirs, of which enough copies were sold to pay a royalty of more than four hundred thousand dollars to Grant's widow--the largest royalty ever paid from any single publication. It saved the Grant family from poverty. Yet even this triumph was a misfortune to Mark Twain, for it led to scores of less profitable book ventures and eventual disaster. Meanwhile he had written and published a number of books. Tom Sawyer, The Prince and the Pauper, Life on the Mississippi, Huckleberry Finn, and A Connecticut Yankee in King Arthur's Court were among the volumes that had entertained the world and inspired it with admiration and love for their author. In 1878-79 he had taken his family to Europe, where they spent their time in traveling over the Continent. It was during this period that he was joined by his intimate friend, the Rev. Joseph H. Twichell, of Hartford, and the two made a journey, the story of which is told in A Tramp Abroad. In 1891 the Hartford house was again closed, this time indefinitely, and the family, now five in number, took up residence in Berlin. The typesetting-machine and the unfortunate publishing venture were drawing heavily on the family finances at this period, and the cost of the Hartford establishment was too great to be maintained. During the next three years he was distracted by the financial struggle which ended in April, 1894, with the failure of Charles L. Webster & Co. Mark Twain now found himself bankrupt, and nearly one hundred thousand dollars in debt. It had been a losing fight, with this bitter ending always in view; yet during this period of hard, hopeless effort he had written a large portion of the book which of all his works will perhaps survive the longest--his tender and beautiful story of Joan of Arc. All his life Joan had been his favorite character in the world's history, and during those trying months and years of the early nineties--in Berlin, in Florence, in Paris--he was conceiving and putting his picture of that gentle girl-warrior into perfect literary form. It was published in Harper's Magazine--anonymously, because, as he said, it would not have been received seriously had it appeared over his own name. The authorship was presently recognized. Exquisitely, reverently, as the story was told, it had in it the touch of quaint and gentle humor which could only have been given to it by Mark Twain.