Courts will not take judicial notice of foreign laws which must be pleaded and proved as facts. The statutory law of another State or country can be proved by the introduction of the printed statutes of such State or country; the unwritten law of another State or country, either by the testimony of a person familiar with the laws of such State or country, or by the introduction of the regular printed volumes of reported cases. Where the common law is in force both in the forum and in the State or country whose laws are in question, the presumption will be that the law on any point covered by the common law is the same.