Wall v The King; Ex Parte

The case involved two respondents, King Won and Wah On, who were charged with being prohibited immigrants in the Northern Territory. They were committed to gaol pending the hearing of these charges. The Supreme Court of the Northern Territory, on applications for habeas corpus, discharged the respondents from custody. Subsequently, the Supreme Court issued ex parte orders absolute for writs of prohibition, preventing the Court of Summary Jurisdiction and the informant from proceeding with the informations. The appellant, the informant, appealed these prohibition orders to the High Court.

The primary legal issue before the High Court was whether the Supreme Court of the Northern Territory had erred in issuing the writs of prohibition. This involved determining the legal effect of the Supreme Court's prior discharge of the respondents on habeas corpus. Specifically, the Court had to consider whether that discharge established a lack of jurisdiction in the Court of Summary Jurisdiction to hear the informations or operated as an estoppel preventing further proceedings.

A majority of the High Court, comprising Knox C.J., Higgins, Gavan Duffy, Powers, Rich, and Starke JJ., held that while the Supreme Court had erred in discharging the respondents from custody (as the warrants indicated lawful cause for detention), this error did not establish a want of jurisdiction in the Court of Summary Jurisdiction. The majority reasoned that the habeas corpus proceedings determined the legality of the detention, not the jurisdiction of the Court of Summary Jurisdiction to hear the informations. The discharge was based on the finding that the respondents were not immigrants, which meant they had not committed the charged offences, rather than a fundamental lack of jurisdiction in the lower court to investigate such matters. Therefore, the discharge did not operate as an estoppel, and prohibition did not lie. Isaacs J., dissenting, argued that the habeas corpus order, being from a competent court and unappealable, conclusively determined the lack of jurisdiction and that further proceedings for the same cause were impermissible, citing principles of personal liberty and the finality of such judgments.

The appeals against the orders absolute for prohibition were allowed, and the writs of prohibition were set aside. The appellant, despite succeeding, was ordered to pay the costs of the respondents on these appeals, as per an undertaking.