GREAT DEBATE IN THE U. S. SENATE, ON EMANCIPATION—THE WHOLE VILLANOUS HISTORY OF SLAVERY, LAID BARE—SPEECHES OF TRUMBULL, HENRY WILSON, HARLAN, SHERMAN, CLARK, HALL, HENDERSON, SUMNER, REVERDY JOHNSON, MCDOUGALL, SAULSBURY, GARRETT DAVIS, POWELL, AND HENDRICKS—BRILLIANT ARRAIGNMENT AND DEFENSE OF "THE INSTITUTION"—U. S. GRANT, NOW "GENERAL IN CHIEF"—HIS PLANS PERFECTED, HE GOES TO THE VIRGINIA FRONT—MR. LINCOLN'S SOLICITUDE FOR THE THIRTEENTH AMENDMENT—BORDER—STATE OBSTRUCTIVE MOTIONS, AMENDMENTS, AND SUBSTITUTES, ALL VOTED DOWN—MR. LINCOLN'S LETTER TO HODGES, OF KENTUCKY, REVIEWING EMANCIPATION AS A WAR MEASURE—THE DECISIVE FIELD-DAY (APRIL 8, 1864)—THE DEBATE ABLY CLOSED—THE CONSTITUTIONAL AMENDMENT PASSED BY THE SENATE