Nevertheless, the Garrisonian movement was erroneously interpreted at the South as an attempt to incite slave insurrection with the attendant horrors of rapine and bloodshed. There were no John Browns then, and Garrison himself was a non-resistant, but since insurrection was a possible consequence of agitation, the Southern people demanded that the agitation should be put down by force. As that could not be done in any lawful way, and since unlawful means were ineffective, they considered themselves under a constant threat of social upheaval and destruction. The repeated declaration of Northern statesmen that there never would be any outside interference with slavery in the states where it existed, did not have any quieting effect upon them. The fight over the Missouri Compromise had convinced them that the North would prevent, if possible, the extension of slavery to the new territories, and that this meant confining the institution to a given space, where it would be eventually smothered. It might last a long time in its then boundaries, but it would finally reach a limit where its existence would depend upon the forbearance of its enemies. Then the question which perplexed Thomas Jefferson would come up afresh: "What shall be done with the blacks?" Mr. Garrott Brown, of Alabama, a present-day writer of ability and candor, thinks that the underlying question in the minds of the Southern people in the forties and fifties of the last century was not chiefly slavery, but the presence of Africans in large numbers, whether bond or free. This included the slavery question as a dollar-and-cent proposition and something more. Mrs. Fanny Kemble Butler, who lived on a Georgia plantation in the thirties, said that the chief obstacle to emancipation was the fact that every able-bodied negro could be sold for a thousand dollars in the Charleston market. Both fear and cupidity were actively at work in the Southern mind. In short, there was already an irrepressible conflict in our land, although nobody had yet used those words. There was a fixed opinion in the North that slavery was an evil which ought not to be extended and enlarged; that the same reasons existed for curtailing it as for stopping the African slave trade. There was a growing opinion in the South that such extension was a vital necessity and that the South in contending for it was contending for existence. The prevailing thought in that quarter was that the Southern people were on the defensive, that they were resisting aggression. In this feeling they were sincere and they gave expression to it in very hot temper. General W. T. Sherman, who was at the head of an institution of learning for boys in Louisiana in 1859, felt that he was treading on underground fires. In December of that year he wrote to Thomas Ewing, Jr.: