OF A. the question whether the prosecutors were or were not immigrants,
held that they were not, and SO discharged them from the custody in which they were held.
Now, the Supreme Court had jurisdiction, as we have held, to examine the legality of the detention of the prosecutors, but that it erred in the exercise of that jurisdiction is beyond question. No [No. 2].
appeal, however, lay from its orders discharging the prosecutors.
From these orders, it, is said, several consequences flow one, that want of jurisdiction in the Court of Summary Jurisdiction to hear and determine the information against the prosecutors is "conclu- sively settled; the other, that the prosecutors, " being delivered or set at large upon the habeas corpus," the Court of Summary Juris- diction is, by force of the provision of the Habeas Corpus Act, prohibited from again committing the prosecutors upon the informations already mentioned.
Both these propositions are but applications of the wider rule that a man shall not be twice vexed for the same cause, reinforced, as it is, by the provisions of the Habeas Corpus Act 1679, sec. 6 (sec. 5 in Chitty's Statutes, 6th ed.).
We are content to assume that the Habeas Corpus Act prohibits a second commitment of the prosecutors for the same cause as the first (Attorney-General for Hong Kong v. Kwok-a-Sing 1; R. V. Governor of Brixton Prison Ex parte Stallmann 2 ). A commitment for the same cause is one that raises for decision the " same question with reference to the validity of the grounds of detention as the first " 3. We are content also to assume, in this case, that the prosecutors were discharged in the habeas corpus proceedings upon the merits; that is, on the ground that they were not immigrants amenable to the provisions of the Immigration Act 1901-1925. Even so, these matters do not disclose any want of jurisdiction in the Court of Summary Jurisdiction over the informations laid before it. They do not support a plea to the jurisdiction but to the informations in the nature of a plea of autrefois acquit.
It is, nevertheless, insisted that the discharge of the prosecutors by the Supreme Court necessarily involved, and actually decided,
1(1873) L.R. 5 P.C. 179.
2(1912) 3 K.B. 424.
3(1873) L.R. 5 P.C., at p. 202.