This reprint of a 1990 publication has 107 pages and is indexed. It’s got 33% more names than the 1850 federal census of Sangamon County, so it may have the answers you’ve been seeking. They’re selling for $8.00 each postpaid. Send your check or money order payable to:
Sangamon County Genealogical Society
PO Box 1829
Springfield, IL 62705-1829
Please include an email address in case there is any question about your order. Thanks!