My family (McHenry) also came from KY to IL, in White County. It is interesting to check the link http://www.cyberdriveillinois.com/GenealogyMWeb/landsrch.html You can put family name in and the county to search and it will show the land purchased. It use to show the cost which in the 1830 and 1840's was about $1.25 per acre. Donna