W. Va. Code § 55-4-16: Extent of possession under patent, deed or other writing.

In a controversy affecting land, when a person claiming under a patent, deed or other writing shall enter upon and take possession of any part of the land in controversy under such patent, deed or other writing, for which some other person has the better title, such adversary possession under such patent, deed or other writing shall be taken and held to extend to the boundaries embraced or included by such patent, deed or other writing, unless the person having the better title shall have actual adverse possession of some part of the land embraced by such patent, deed or other writing.