. "North Henderson Township, Mercer County, Illinois" . . "-6" . . . "-5" . "9.064958386176E7" . "North Henderson Township, Mercer County, Illinois" . "1853-11-08" . . . . "North Henderson" . . "North Henderson Township" . "0.0" . "4.633225902509351" . . . . "0.0" . . "North Henderson Township, Mercer County" . "9.064958386176E7" .