To future generations the period in American history, of most absorbing interest and profound inquiry, will be that embracing the incipiency, progress, and termination of the revolution which had its most pronounced phase in the memorable war of 1861. Historians rarely concur in their estimates of the limits of a revolution, and usually we find quite as much divergence in their views of the scope of its operations, as in their speculations as to its origin and causes, and their statements of its incidents and results. If, however, it is difficult to assign, with minute accuracy, the exact limits and proper scope of those grand trains of consecutive events, which swerve society from the beaten track of ages, divert nations from the old path of progress into what seems to be the direction of a new destiny, and often transform the aspect of continents, it is comparatively an easy task to reach a reliable statement of their more salient and conspicuous incidents. It is in this aspect that the Titanic conflict, which had its beginning with the booming of the guns in Charleston harbor in April, 1861, and its crowning catastrophe at Appomattox Court-house in April, 1865, will be chiefly attractive to the future student. As a point of departure from the hitherto unbroken monotony of American history, the beginning of a new order of things, the extinction of important elements of previous national existence, embracing much that was consecrated in the popular affections; in short, as a complete political and social transformation, an abrupt, but thorough perversion of the government from its original purposes and previous policy, this period must take its place, with important suggestions of theory and illustration, among the most impressive lessons of history. The profound interest which shall center upon the period that we have under consideration, must necessarily subject to a rigid investigation the lives, characters, and conduct of those to whom were allotted conspicuous parts in the great drama. It is both a natural and reasonable test that the world applies in seeking to solve, through the qualities and capacities of those who direct great measures of governmental policy, the merits of the movements themselves. The late President of the United States, Mr. Lincoln, avowed his inability to escape the judgment of history, and the bare statement sufficiently describes the inevitable necessity, not only of his own situation, but of all who bore a prominent part on either side of the great controversy.