Franklin county illinois

I am interested in finding out values of mineral rights in Franklin County Illinois, specifically for oil. I have been recently contacted regarding a lease of my rights.

POTENTIAL ASSETS CARL R. AND Betty J. Jordan Reviewed Feb. 5, 2015

The coal, oil, gas and other minerals underlying the surface of the southwest one fourth (1/4) of the Northeast quarter of Section twenty-six (26) W Township Five (5) , South, Range one (1) East of the Third Principal Meridian in Franklin County, Illinois.