A parcel of land behind the Gov. Duncan mansion on West State Street was deeded as a cemetery. The land now is incorporated in the deed for the property at 1009 West Lafayette Avenue. It is not certain if any burials were ever made in this cemetery. Gov. Duncan was, for a time, buried in front of the mansion, near West State Street. His body is now considered to be buried in Diamond Grove Cemetery, contrary to often denied rumors that medical students at Illinois College stole his body for study. City records show that the family was moved to Diamond Grove in May of 1873.