A general challenge of a proposed juror may be made on the basis of his incompetency or unworthiness to act in such capacity in _any_ action.

A particular challenge may be based on some bias in this particular case which would unfit the proposed juror for rendering an impartial verdict.
Habeas Corpus .-- Not connected directly with trials but related to the district court is the writ of _habeas corpus_.

This is the most famous writ in law, and has been styled "the chief bulwark of liberty." It was designed originally to secure a person from being detained in prison without due process of law, and it served as a mighty check upon arbitrary power.

Its operation has been extended so as to include any detention against the will of the person detained.

The writ, as will be seen by reference to the appendix (p.