"The Constitution assigns particular classes of causes to the original jurisdiction of the Supreme Court, and other courts are to exercise such powers and duties as are or may be prescribed by Congress. Congress has not as yet found it necessary or expedient to confer on the circuit or other inferior courts all the jurisdiction created or authorized by the Constitution; thus there are many cases in which a summary jurisdiction usually belonging to courts, such as that of mandamus and injunction, are not provided for by general law, but some such cases are provided for. Thus by the act of March 2, 1833, it is declared that the jurisdiction of the Circuit Courts of the United States shall extend to all cases in law or equity arising under the revenue laws of the United States; and if any person be injured in his person or property on account of any act by him done under any revenue law of the United States, he may bring suit immediately in the Circuit Court of the United States; and if he be sued in any State court for such act, he may cause such suit to be immediately removed into the Circuit Court of the United States; and if the State court refuse a copy of its record, that record may be supplied by affidavit; and if the defendant be under arrest, or in custody, he is to be brought by _habeas corpus_ before the Circuit Court of the United States. Under the first part of these provisions, writs of mandamus and injunction may be issued, and all other writs and processes suitable to the case; and any judge of any court of the United States is authorized to grant writs of _habeas corpus_ in all cases of prisoners committed or confined for any act done in pursuance of a law of the United States, or of any order, process or decree of any court of the United States. These provisions are all found in the permanent sections of the act of Congress already referred to. The importance and efficiency of these provisions, if events were to arise in which obstruction to the collection of revenue should be attempted or threatened, are too obvious to require comment. The several district attorneys of the United States will take especial care to inform themselves of these enactments of law, and be prepared to cause them to be enforced in the first and in every case which may arise, justly calling for their application.