“ The act in question provides for the granting of a favor to persons convicted of crime who are confined in a state prison. People v. Cook, 147 Mich. 127-132, 110 N. W. 514. It gives to a criminal so confined, subsequent to the expiration of the minimum term of imprisonment stated in the sentence, the privilege to make application for parole to the warden or superintendent of the prison where he is confined, and the warden is directed to send such application to the governor. ”

“ Even after the convict is at large by virtue of the parole granted, he is still deemed to be serving out the sentence imposed upon him, and he remains technically in the legal custody and under the control of the governor, 'subject at any time to be taken back within the inclosure of the prison from which he was permitted to go at large, for any reason that shall be satisfactory to the governor, and at his sole discretion ”

“ Spies v. Illinois (Ex parte Spies) 123 U.S. 131, 31 L. ed. 80, 8 Sup. Ct. Rep. 21; Eilenbecker v. District Court, 134 U.S. 31, 33 L. ed. 801, 10 Sup. Ct. Rep. 424; Brown v. New Jersey, 175 U.S. 172-174, 44 L. ed. 119, 120, 20 Sup. Ct. Rep. 77 ”