Flourished: Petersburg, Illinois
Greer was an early settler of the area near New Salem, Clary's Grove, and later Petersburg. He was the area's first magistrate and Justice of the Peace (in which election Abraham Lincoln voted for him). He served as the Menard County surveyor from 1839 to 1843 and spent time teaching school as well.
Election Returns for Clary’s Grove Precinct in Sangamon County, Illinois; U.S. Census Office, Fifth Census of the United States (1830), Sangamon County, IL, 134; The History of Menard and Mason Counties, Illinois (Chicago: O. L. Baskin, 1879), 281, 311.