1 This is a suit to quiet title to a forty acre tract of land in Roger Mills County, Oklahoma. It was brought by the plaintiffs, James S. Twyford, Solon W. Smith, Elizabeth L. Gibson and Louise G. Smith, as the alleged owners of a one-half undivided interest in the minerals, against the defendants, J.A. Logan, Cy Howenstein and A.C. Quattlebaum, the alleged owners of the remainder of the fee, the defendant E.V. Fletcher, who claimed title by virtue of a certificate tax deed, the defendants, Shell Oil Company, Incorporated, and Shell Oil Company, the latter claiming as oil and gas lessee under Fletcher, and the defendants, Paul W. Fleeger and E.M. Cowles. The parties will be referred to as they appeared in the trial court.