Watch for map references to "licks." These are natural salt sources, typically from springs/brooks that are partially dry. In central Missouri, there are "Booneslick" everything: roads, trails, libraries, etc. All refer to a natural "salt lick" owned and operated by Daniel Boone and his kin through Nathan, just west of present-day Columbia, MO. But "licks" are found all over the forest lands of the midwest.