"The issue of slavery was soon to trouble the relations of the North and South. In 1819 a Bill was tabled in Congress to admit Missouri as a state to the Union. This territory lay inside the bounds of the Louisiana Purchase, where the future of slavery had not so far been decided by Federal law. As the people of Missouri proposed to allow slavery in their draft constitution the Northerners looked upon this Bill as an aggressive move to increase the voting power of the South. A wild campaign of mutual recrimination followed. But with the increasing problem of the West facing them both, North and South could not afford to quarrel, and the angry sectional strife stirred up by this Bill ended in a compromise which was to hold until the middle of the century. Missouri was admitted as a slave-holding state, and slavery was prohibited north of latitude 36° 30' within the existing territories of the Union which did not yet enjoy statehood. As part of the compromise Maine, which had just severed itself from Massachusetts, was admitted as a free state, making the division between slave and free equal, being twelve each. Far-seeing men realised the impending tragedy of this division. John Quincy Adams noted in his diary, “I considered it at once as the knell of the Union. I take it for granted that the present question is a mere preamble — a title-page to a great, tragic volume.”"