Current reports and subsequent developments leave no doubt that this Senator, being then acting Vice-President of the United States, [Footnote: By virtue of his office as President _pro tempore_ of the United States Senate. The Vice-Presidency was vacant; William R. King, chosen with President Pierce, had died.] immediately after the August adjournment of Congress hurried away to his home in Platte County, Missouri, and from that favorable situation personally organized a vast conspiracy, running through nearly all the counties of his State adjoining the Kansas border, to decide the slavery question for Kansas by Missouri votes. Secret societies under various names, such as "Blue Lodges," "Friends' Society," "Social Band," "Sons of the South," were organized and affiliated, with all the necessary machinery of oaths, grips, signs, passwords, and badges. The plan and object of the movement were in general kept well concealed. Such publicity as could not be avoided served rather to fan the excitement, strengthen the hesitating, and frown down all dissent and opposition. Long before the time for action arrived, the idea that Kansas must be a slave State had grown into a fixed and determined public sentiment. The fact is not singular if we remember the peculiar situation of that locality. It was before the great expansion of railroads, and western Missouri could only be conveniently approached by the single commercial link of steamboat travel on the turbid and dangerous Missouri River. Covering the rich, alluvial lands along the majestic but erratic stream lay the heavy slave counties of the State, wealthy from the valuable slave products of hemp and tobacco. Slave tenure and slavery traditions in Missouri dated back a full century, to the remote days when the American Bottom opposite St. Louis was one of the chief bread and meat producing settlements of New France, sending supplies northward to Mackinaw, southward to New Orleans, and eastward to Fort Duquesne. When in 1763 "the Illinois" country passed by treaty under the British flag, the old French colonists, with their slaves, almost in a body crossed the Mississippi into then Spanish territory, and with fresh additions from New Orleans founded St. Louis and its outlying settlements; and these, growing with a steady thrift, extended themselves up the Missouri River.