midnight
`` Mr. Kamanako is going to leave us , '' announced Trotter , with a smile . `` He goes north to-night . Here is the slip of paper , my boy , that will take you past any meddlesome inquiry . But it is good only until midnight , so I advise you to be sure to catch to-night 's express . '' `` I shall , and thank you , honorable sir , '' replied the Japanese , bowing . `` Then I wo n't detain you any longer , or you may miss your train . '' Once more the Japanese bowed , then turned to Captain Jack Benson .