It frequently happens that the essential character of a government changes while its form remains the same. In 1801 France was nominally a Republic, but its administration was Imperial. In 1853 the United States ceased to be a democracy and became an oligarchy, governed by thirty thousand slave-holders,--until the people reconquered their rights on the field of battle. Accustomed to despotic power in their own States for more than two generations, and justifying themselves always by divine right, the slave-holders possessed all the self-confidence, pretension, and arrogance of the old French nobility. They were a self-deluded class of men, of all classes the most difficult to deal with, and Sumner was the Mirabeau who faced them at Washington and who pricked the bubble of their Olympian pretensions by a most pitiless exposure of their true character. Those men had come to believe that the ownership of slaves was equivalent to a patent of nobility, and they were encouraged in this monarchical illusion by the nobility of Europe. In Disraeli's "Lothair" an English duke is made to say: "I consider an American with large estates in the South a genuine aristocrat." The pretension was ridiculous, and the only way to combat it was to make it appear so. Sumner characterized Butler, of South Carolina, and Douglas, of Illinois, who was their northern man of business, as the Don Quixote and Sancho Panza of an antiquated cause. The satire hit its mark only too exactly; and two days later Sumner was assaulted for it in an assassin-like manner,--struck on the head from behind while writing at his desk, and left senseless on the floor. Sumner was considered too low in the social scale for the customary challenge to a duel, and there was no court in Washington that would take cognizance of the outrage. The following day, when Wilson made the most eloquent speech of his life in an indignant rebuke to Butler and Brooks, Butler started from his seat to attack him, but was held back by his friends. They might as well have allowed him to go, for Wilson was a man of enormous strength and could easily have handled any Southerner upon the floor.