Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3862.3–1 Right by occupancy

(a) The provisions of R.S. 2332 (30 U.S.C. 38), greatly lessen the burden of proof, more especially in the case of old claims located many years since, the records of which, in many cases, have been destroyed by fire, or lost in other ways during the lapse of time, but concerning the possessory right to which all controversy or litigation has long been settled.

(b) When an applicant desires to make his proof of possessory right in accordance with this provision of law, he will not be required to produce evidence of location, copies of conveyances, or abstracts of title, as in other cases, but will be required to furnish a duly certified copy of the statute of limitation of mining claims for the State, together with his statement giving a clear and succinct narration of the facts as to the origin of his title, and likewise as to the continuation of his possession of the mining ground covered by his application;  the area thereof;  the nature and extent of the mining that has been done thereon;  whether there has been any opposition to his possession, or litigation with regard to his claim, and if so, when the same ceased;  whether such cessation was caused by compromise or by judicial decree, and any additional facts within the claimant's knowledge having a direct bearing upon his possession and bona fides which he may desire to submit in support of his claim.