This supplemental volume expands upon the seven-volume edition of Constitutional Documents of the United States of America 1776–1860, which was published from 2006 to 2009. It contains 14 constitutional documents from 8 different U.S. states which were recently made accessible for the first time in American libraries and archives. Among the documents in the collection are the constitution of the short-lived “Republic of Indian Stream,” which succeeded from New Hampshire from 1832 to 1835, as well as rare constitutional documents from New Mexico and Texas written in both Spanish and English. The texts have been edited, annotated, and indexed on the basis of the original manuscripts and (in certain cases rare) original prints produced by the official state or constitutional convention printing presses.