This is the point from which the lands acquired through the Louisiana Purchase of 1803 were subsequently surveyed: the land surveys for all or part of the states of Arkansas, Louisiana, Oklahoma, Missouri, Kansas, Colorado, Nebraska, Iowa, Minnesota, North and South Dakota, Wyoming, and Montana were measured from this point in the middle of an eastern Arkansan swamp. For more than 100 years, the site lay forgotten until its rediscovery during a resurvey of county lines in 1921. The granite monument at the site was erected in 1926.

Information provided by the National Registry of Historic Places, a program of the National Park Service