It has long since been decided by the Supreme Court that neither that tribunal nor the circuit courts of the United States, held within the respective States, possess the power in question; but it is now held that this power, denied to both of these high tribunals (to the former by the Constitution and to the latter by Congress), has been by its legislation vested in the circuit court of this District. No such direct grant of power to the circuit court of this District is claimed, but it has been held to result by necessary implication from several sections of the law establishing the court. One of these sections declares that the laws of Maryland, as they existed at the time of the cession, should be in force in that part of the District ceded by that State, and by this provision the common law in civil and criminal cases, as it prevailed in Maryland in 1801, was established in that part of the District. In England the court of king's bench--because the Sovereign, who, according to the theory of the constitution, is the fountain of justice originally sat there in person, and is still deemed to be present in construction of law--alone possesses the high power of issuing the writ of mandamus, not only to inferior jurisdictions and corporations, but also to magistrates and others, commanding them in the King's name to do what their duty requires in cases where there is a vested right and no other specific remedy. It has been held in the case referred to that as the Supreme Court of the United States is by the Constitution rendered incompetent to exercise this power, and as the circuit court of this District is a court of general jurisdiction in cases at common law, and the highest court of original jurisdiction in the District, the right to issue the writ of mandamus is incident to its common-law powers. Another ground relied upon to maintain the power in question is that it was included by fair construction in the powers granted to the circuit courts of the United States by the act "to provide for the more convenient organization of the courts of the United States," passed 13th February, 1801; that the act establishing the circuit court of this District, passed the 27th day of February, 1801, conferred upon that court and the judges thereof the same powers as were by law vested in the circuit courts of the United States and in the judges of the said courts; that the repeal of the first-mentioned act, which took place in the next year, did not divest the circuit court of this District of the authority in dispute, but left it still clothed with the powers over the subject which, it is conceded, were taken away from the circuit courts of the United States by the repeal of the act of 13th February, 1801.