Pay your taxes! Delinquent tax reports have been published almost every year. Here are a couple of samples transcribed by Dorothy Falk and Laura Cordingley. There is no way these people could have understood nor predicted that their names would be on the Internet, over 150 years after they failed to make a timely payment.
Bureau of Land Management Records – Federal land patents issued between 1820 and 1908 - The Illinois portion is the same as the UIC link above, this link includes other states.
Clinton County Land Records - Second and succeeding land sales - Information on contacting the County Clerk is on this web page.