This section, which restricts only the Federal Government and not the States,[1435] is the only place in the Constitution where the writ of _habeas corpus_ is mentioned. The framers took for granted that the courts of the United States would be given jurisdiction to issue this, the greatest of the safeguards of personal liberty embodied in the common law, and the Judiciary Act of 1789[1436] provided for the issuance of the writ according to "the usages and principles of law." At common law the purpose of such a proceeding was to obtain the liberation of persons who were imprisoned without just cause.[1437] While the Supreme Court conceded at an early date that the authority of the federal courts to entertain petitions for _habeas corpus_ derived solely from acts of Congress,[1438] a narrow majority recently asserted the right to expand the scope of the writ by judicial interpretation and to sanction its use for a purpose unknown to the common law, i.e., to bring a prisoner into court to argue his own appeal. Speaking for the majority Justice Murphy declared that: "However, we do not conceive that a circuit court of appeals, in issuing a writ of _habeas corpus_ under Sec. 262 of the Judicial Code, is necessarily confined to the precise forms of that writ in vogue at the common law or in the English judicial system. Section 262 says that the writ must be agreeable to the usages and principles of 'law,' a term which is unlimited by the common law or the English law. And since 'law' is not a static concept, but expands and develops as new problems arise, we do not believe that the forms of the _habeas corpus_ writ authorized by Sec. 262 are only those recognized in this country in 1789, when the original Judiciary Act containing the substance of this section came into existence."[1439] Errors Which May Be Corrected on Habeas Corpus