The area now known as "Hot Springs National Park" first became United States territory in 1803 as part of the Louisiana Purchase. The first permanent settlers to reach the Hot Springs area in 1807 were quick to realize the springs' potential as a health resort. By the 1830s, log cabins and a store had been built to meet the needs (albeit in a rudimentary way) of visitors to the springs. To protect this unique national resource and preserve it for the use of the public, the Arkansas Territorial Legislature had requested in 1820 that the springs and adjoining mountains be set aside as a federal reservation (not to be confused with the Indian reservations being established around the same time). On April 20, 1832, President Andrew Jackson signed legislation to set aside "...four sections of land including said (hot) springs, reserved for the future disposal of the United States (which) shall not be entered, located, or appropriated, for any other purpose whatsoever." This makes Hot Springs National Park the oldest national park among current N. P. S. parks, predating Yellowstone National Park by forty years.