This is not exactly a genealogy question but you may be able to help me. In 1939 my grandfather Tilman M. Cantrell died leaving 2 farms to his children. They later sold the land but retained some mineral rights. The property was north of Hwy 67 on what is now Lone Star Ordnance Plant. How do I find out if they are drilling for oil on that property? Here are some of the heirs' names: John Cantrell, H. E. Cantrell, Jewell Cantrell, T. M. Cantrell, Carria O'Donald, Katherine Harper, Regina Myers, and Lena Myrick. All these people are deceased but there are quite a few of us grandchildren living. Thanks for your help. Julia Myrick Clay