The Sixteenth Congress met on December 6, 1819, and the Missouri question came up immediately. A compromise that the territory west of the Mississippi should be divided in the same manner as that east of the river was rejected by the North. Fortunately or unfortunately, there is some difficulty in deciding which, Maine applied at this time for admission, and the South in the Senate refused to admit Maine unless the North would admit Missouri, and out of the situation rose the Missouri Compromise. By a close majority the Senate joined Maine and Missouri in the same Bill, and then Senator Jesse B. Thomas, of Illinois, moved that, excepting Missouri, slavery should forever be prohibited in all the Louisiana Territory north of 36 degrees 30 minutes north latitude, this being the southern boundary of Missouri. The Bill was taken to the House toward the end of January, 1820, but it refused to concur. The Senate stood fast, and after some further angry debate the House yielded early in March, 1820; Maine came into the Union, and Missouri was permitted to draft a Constitution, which, if acceptable, would admit her to statehood. But the difficulty was not over, for when Missouri presented her Constitution it was found to contain a provision that the Legislature should pass a law preventing free negroes from settling in the State. The North violently opposed this provision and refused to admit Missouri, and the situation was even more serious than when the original subject was considered. The intense excitement spread from Washington throughout the country, and many felt that the Union would be dissolved. The debate continued until the middle of February, 1821, without solution, and Congress was to adjourn early in March. Maine had already been admitted, and her representatives were in Congress. The South felt that she had been betrayed. Finally a second compromise on the Missouri question was reached, through the efforts of Henry Clay, and Missouri was admitted upon condition that no law should ever be passed by her to enforce the objectionable provision in her Constitution. While it was true that the North received in area decidedly the best of the bargain, the Missouri Compromise was a distinct victory and gain for the South, because she obtained a present, tangible and important advantage in the admission of a slave State and the establishment of slavery in the heart of the Louisiana Territory. The North obtained nothing but a hazy, speculative advantage, and as the subsequent history of this Compromise proved, the South intended to keep it only as long as it served her interests.