Discovery may be enforced

(1) Where any person files a petition in the Supreme Court for the discovery of the name of any person concerned as printer, publisher or proprietor of any newspaper or of any matter relative to the printing or publishing of any newspaper, in order more effectively to bring or carry on any suit or action for damages alleged to have been sustained by reason of any slanderous or libellous matter contained in any such newspaper respecting such person, it shall not be lawful for the defendant to plead or demur to such petition, but such defendant shall be compellable to make the discovery required. (2) Any discovery made under this section shall not be made use of as evidence or otherwise in any proceeding against the defendant, except only in that proceeding for which the discovery is made.