A deed or will or other writing purporting to create, terminate, or affect an interest in real or personal property is presumed to be authentic if it: (a) Is at least 30 years old; (b) Is in such condition as to create no suspicion concerning its authenticity; (c) Was kept, or if found was found, in a place where such writing, if authentic, would be likely to be kept or found; and (d) Has been generally acted upon as authentic by persons having an interest in the matter.