=IV. Where One Person makes a Claim to Land Included within the Boundaries of Another.= Where anyone inherits or acquires land within the boundaries of another person, or, during the absence, or without the knowledge of the owner of the same, obtains possession of such land for a long period of time, or for more than the term of fifty years, even though his occupation of said property was public and notorious, he shall have no permanent title thereto; and as soon as the boundaries of said land shall have been established by the discovery of the ancient landmarks, by persons appointed to find the same, he shall restore said land so appropriated to the owner thereof. Nor shall any obligation of the owner, nor undisputed possession for a long period of time, avail against the ancient landmarks, when they are discovered. But it must be proved, if it can be ascertained, whether said land was acquired by one of the contesting parties or by the ancestors of either of them; for if such time should have elapsed that neither of said parties, nor any of their ancestors, knew who first obtained the title to or possession of said property, and the party in possession is unable to show by an instrument in writing, or by witnesses, whence the title to said premises was derived, because the fact of original possession is in doubt; whoever of said claimants is in possession of said land at the time shall have an irrevocable right to retain it. Where, however, one person seems to have been in possession of said land without the other claimant asserting any right to the same, and such possession shall be public, and apparently established by existing landmarks, and no evidence of fraud be disclosed; it is not reasonable that the title of the owner should be lost by reason of its occupation for a protracted period by another. Where one person has obtained possession of land by force or fraud, this shall in no wise affect the rights of another claimant. If, however, one person should attempt to gain possession of property occupied by another, not through fraud or insolence, but by a judicial proceeding, if his claim is just, he shall be entitled to possession of said property. But if, unknown to the owner, he should unexpectedly attempt to gain possession of the land of the latter, the owner of the same shall have the right to accuse him of being a trespasser with violence, and, by legal proceedings, compel him to surrender said property. =V. Where any Change was made in the Boundaries of Land During the Time of the Romans, no Claim Based upon Other Boundaries shall Prevail.=