Owen J. Roberts, Walker v. Johnston — Opinion of the Court
“ Since the allegations of such petitions are often inconclusive, the practice has grown up of issuing an order to show cause, which the respondent may answer. By this procedure the facts on which the opposing parties rely may be exhibited, and the court may find that no issue of fact is involved. In this way useless grant of the writ with consequent production of the prisoner and of witnesses may be avoided where from undisputed facts or from incontrovertible facts, such as those recited in a court record, it appears, as matter of law, no cause for granting the writ exists. ”
