duty of the Federal Government to conclude in self-defence a treaty of annexation with Texas." As to this transaction, Von Holst, Calhoun's biographer, has said: "It may not be correct to apply, without modification, the code of private ethics to politics; but, however flexible political morality may be, a lie is a lie, and Calhoun knew there was not a particle of truth in these assertions." The annexation treaty was held back in the American Senate until the Democratic Convention of 1844 had declared for the reannexation of Texas. In the hope that this would secure ratification the treaty was submitted in June, but the Senate once more rejected it by 35 to 16 votes. Undismayed by this, President Tyler within three days sent another message to the House of Representatives asking for reconsideration of the subject, but the matter went over until after the Presidential campaign in the autumn. Henry Clay's vacillating stand throughout this controversy proved fatal to his Presidential aspirations. [Sidenote: Anti-Mormon riots] [Sidenote: Brigham Young] During this same year, the Indians surrendered the regions adjoining Lake Superior, which were promptly settled by white men. Iron was then discovered at Marquette and copper at Kewenaw Point. At Nauvoo, Illinois, where the Mormons had just erected a temple, their revival of patriarchal polygamy excited the wrath of the people. Riots broke out June 27. The Mormon leader, Joseph Smith, and his brother, who had been lodged in jail, were killed. Brigham Young thenceforth became the leader of the Mormons. [Sidenote: Morse's telegraph] [Sidenote: Wells' anaesthetic discovery] By means of a Congressional grant of $30,000, Samuel B.F. Morse constructed his first telegraph line over the forty miles between Baltimore and Washington. The first message, "What hath God wrought?" is still preserved by the Connecticut Historical Society. Before this Alfred Vail had perfected his telegraph code of alphabetical signs, with his dry point reading register and relay key. Now Ezra Cornell contributed his invention of an inverted cup of glass for insulating live wires. Dr. Horace Wells, a dentist of Hartford, Connecticut, first employed nitrous oxide gas, popularly known as laughing gas, in extracting one of his own teeth. [Sidenote: Death of John Dalton]