Illinois | history | American Museum of Natural History | Natural History Museum | History | University of Illinois at Urbana-Champaign | History (U.S. TV channel) | Peoria, Illinois | Rockford, Illinois | Evanston, Illinois | Springfield, Illinois | natural history | Field Museum of Natural History | Northern Illinois University | Cook County, Illinois | History of China | National Museum of Natural History | Illinois Institute of Technology | The History Channel | Joliet, Illinois | Natural history | Jewish history | Swedish Museum of Natural History | Rock Island, Illinois | Belleville, Illinois | Aurora, Illinois | Southern Illinois University | Quincy, Illinois | Natural History | National Museum of American History |
Although Illinois was a free state, Crenshaw leased the salt works in nearby Equality, Illinois from the U.S. Government, which permitted the use of slaves for the arduous labor of hauling and boiling brackish water, from local salt springs, to produce salt.