The following is a copy of the document in the National Archives amending the bill in the U.S. Congress admitting Maine as a state.
Source: Amendment to the bill for the admission of the State of Maine into the Union allowing for the admission of the State of Missouri: 01/06/1820. ARC Identifier 306268. Center for Legislative Archives, Washington, DC. Item from Record Group 46: Records of the U.S. Senate, 1789 – 2011. Image only at http://media.nara.gov/media/images/28/3/28-0257t.gif (accessed August 4, 2011)