The Union. Hon. Robert J. Walker, 641 Something we have to Think of, and to Do. C. S. Henry, LL.D. 657 Cambridge and Its Colleges, 662 A Physician's Story, 667 La Vie Poetique, 679 The Ash Tree. Charles G. Leland, 682 An Englishman in South Carolina, 689 The Causes of the Rebellion. Hon. F. P. Stanton, 695 On Guard. John G. Nicolay, Private Secretary to President Lincoln, 706 Railway Photographs. Isabella McFarlane, 708 The Obstacles to Peace. A Letter to an Englishman. Hon. Horace Greeley, 714 Thank God for All. Chas. G. Leland, 718 A Merchant's Story. Edmund Kirke, 719 The Freed Men of the South. Hon. F. P. Stanton, 730 Was He Successful? Richard B. Kimball, 734 Gold. Hon. Robert J. Walker, 743 Literary Notices, 747 Editor's Table, 750 * * * * * ANNOUNCEMENT. The Proprietors of THE CONTINENTAL MONTHLY, warranted by its great success, have resolved to increase its influence and usefulness by the following changes: The Magazine has become the property of an association of men of character and large means. Devoted to the NATIONAL CAUSE, it will ardently and unconditionally support the UNION. Its scope will be enlarged by articles relating to our public defences, Army and Navy, gunboats, railroads, canals, finance, and currency. The cause of gradual emancipation and colonization will be cordially sustained. The literary character of the Magazine will be improved, and nothing which talent, money, and industry combined can achieve, will be omitted.