Thank you for your response. I know absolutely nothing of this type of thing. The letter was from CPC Petroleum, LLC. It also says Hog Creek Royalty, LLC. In an email I received today it says: Undivided 15/653.48 mineral interest in said lands. 15 Net Mineral Acres. Subject to undivided 1/3 Non-participating royalty interest reserved in a Warranty deed dated May 1, 1945 and recorded Vol 44, Page 26 of the Deed Records of Borden County. Last time the interest was leased was in 2012. One well was drilled on the property in 1982, but it was plugged and abandoned in 1984. There has been no production since. Then e sent a runsheet covering my chain of title. That is all the information he sent me. Any help would be appreciated. Thank you.