(after stating the facts as above). In committing a prisoner to await the action of the grand jury, a United States commissioner exercises the powers common to all committing magistrates. If there is probable cause for holding the defendant for trial, he commits him; if not, he discharges him. To commit, he should not require that proof which would be necessary to convict on a trial in chief, nor should he require proof that convinces his mind of the defendant’s guilt. He should, however, require that probable cause be shown. That means that the case is made out by-proof furnishing good reason to believe that the crime alleged has been committed by the person charged with having committed it. Marshall, C. J.; Trial of Burr (Coombs) p. 4, Fed. Cas. No. 14,692a. When the proof does not furnish such “good reason,” it is the duty of the commissioner to discharge the defendant, and this duty is just as imperative as the duty to commit him on proper proof. An examination of the evidence in this case will show that there is no evidence — direct or circumstantial — that the petitioner ever saw the obscene letters. They are not shown to have been written by her or for her. It is not shown that the writing resembles hers, nor even that she can write. There is nothing in the evidence to make the letters admissible against her. It is clear that, on the evidence, she was entitled to be immediately discharged by the commissioner.
That conclusion, however, does not necessarily dispose of the case on this proceeding. The writ of habeas corpus is not ordinarily permitted to be used to review the decision of a United States commissioner on the facts. Although it may be clear that the evidence was not sufficient to hold the accused, it seems that, if there was any evidence tending to show her guilt, the action of the commissioner will not be disturbed on habeas corpus. The court will not inquire into the merits of the decision of the committing magistrate, if he has before him any competent legal evidence, tending to incriminate (lie defendant, on which to exercise his judgment. In re Cortes, 136 U. S. 330, 10 Sup. Ct. 1031., The present practice in the federal courts is that, where there is some evidence tending to show that the party who has been committed by a United States commissioner is guilty of the offense charged, the sufficiency of such evidence is not open to review on a proceeding by habeas corpus. The commissioner is to judge of the sufficiency of the evidence. But the court may inquire whether the commissioner had any competent or legal evidence before him on which to exercise his judgment as to the criminality of the accused. Church, Hab. Corp. (2d Ed.) § 231. If it appears from the evidence before the committing magistrate, not only that no probable cause was shown, but that there was no legal evidence before him tending to incriminate the petitioner, she should be discharged on habeas corpus. Id. § 230, note 4. It is true that there was evidence before the commissioner tending to show that the offense charged had been committed by some one, but a careful examination discloses no legal evidence on which the commissioner could exercise his judgment in holding the petitioner for trial. An order will be made discharging the petitioner.