From this time forward, Samuel L. Clemens is seen in a new environment, in association with new ideas and a new civilization. The history of this second period does not fall within the scope of the present work. It has just been narrated with brilliancy and charm by his close associate and most intimate friend, Mr. William Dean Howells, in his admirable book 'My Mark Twain'. In the subsequent portion of the present work attention will be directed solely to those features of Mark Twain's life which have a direct bearing upon his career as a man of letters, and which throw into relief the progressive development of his genius. The South and the West contributed to Mark Twain's development, and added to his store of vital experience, in greater measure than all the other influences of his life combined. From the inexhaustible well of those experiences he drew ever fresh contributions for the satisfaction of the world. His mind was stocked with the rich, crude ore of early experience--the romance and the reality of a life full of prismatic variations of colour. The civilization of the East, its culture and refinement, tempered the genius of Mark Twain in conformity with the indispensable criteria of classic art. Under the broadening influence of its persistent nationalism, he became more deeply, more profoundly, imbued with the comprehensive ideals of American democracy. He never lost the first fine virginal spontaneity of his native style, never weakened in the vigour of his thought or in the primitiveness of his expression. His contact with the East compassed the liberation of that vast fund of stored--up early experiences, acquired through grappling with life in many a rude encounter. Out of its own life, the East never contributed to Mark Twain's works, in any appreciably momentous way, either volume or immensity of fertile, suggestive human experience. If we eliminate from the list of Mark Twain's works those books which have their roots deep set in the soil of South and West, we eliminate the most priceless assets of his art. Indeed, it may be doubted whether, were those works struck from the catalogue of his contributions, Mark Twain could justly rank as a great genius. To his association with the South and the Southwest are due 'Tom Sawyer', 'Huckleberry Finn', 'Pudd'nhead Wilson', and 'Life on the Mississippi'. 'The Jumping Frog' and 'Roughing It' belong peculiarly to the West, and even 'The Innocents Abroad' falls wholly within the period of Mark Twain's influence by the West, its standards, outlook, and localized viewpoint.