In the South Calhoun was all but idolized. He was tall and slender of person, refined and elegant in manners, carrying with him great personal charm. He was a puritan in his morals, maintained a spotless reputation, and escaped all criticism with reference to private life that was visited upon his competitors. Many a Northern man who went to Congress hating the very name of Calhoun, the arch-secessionist, was compelled to confess that he had to steel his heart against the charm of Calhoun's speech and personality. The simplicity of his character, the clearness of his thinking, the sincerity and moral earnestness of his nature, all united to lend him the influence that he exerted over men like Oliver Dyer, Webster's friend, who said of Calhoun, "He was by all odds the most fascinating man in private intercourse that I have ever met." When Webster and Clay came into collision, it was over a subject apparently far removed from the bondage of slaves. If slavery was the spark that fired the magazine for the great explosion in 1861, the tariff furnished the powder. The South produced raw material, and imported all her tools, comforts and conveniences, while the North had free labour, and her educated working classes were good purchasers, and lent generous support to manufacturers. Exporting its raw cotton to England, the South sent its leaders to Congress to ask for free trade with foreign countries, or in any event, a lower tariff. The Northern manufacturers sent their leaders to Congress to ask for protection against foreign woollens, cottons, and all English tools and French silks, and luxuries. Therefore the interests of the North antagonized the interests of the South. In the South the anti-slavery sentiment had disappeared because of Whitney's cotton gin. As Beecher wittily put it in his Manchester speech: "Slaves that before had been worth three to four hundred dollars began to be worth six hundred. That knocked away one-third of adherence to the moral law. Then they became worth seven hundred dollars, and half the law went; then eight or nine hundred dollars, and there was no such thing as moral law; then one thousand or twelve hundred dollars, and slavery became one of the beatitudes."