court to inquire into the facts. No man, by the Constitution, is compelled to testify against himself. The petitioner, with others, was in volved in the effort to establish their separate independence of the authority of the United States, and resisted it by levying war. The punishment for treason anterior to the passage of the act of 1865 was death or imprisonment; hut this act imposes an additional penalty, that persons thus accused shall not be