The document provides links to images related to the Missouri Compromise of 1820, which was legislation proposed by Henry Clay that allowed Missouri to enter the United States as a slave state and maintained the balance of power between slave and free states by extending the northern boundary of Missouri compromise line at the 36°30' parallel. The images include a diagram of the balance of states pre- and post-Missouri, a map showing the Missouri compromise line, and pictures of Henry Clay and a Senate debate related to the compromise.