From the Richmond Dispatch, 2/6/1863, p. 1, c. 7
Substitute Agent Arrested. – Messrs. Castle and Franklin, of the Provost Marshall Detective Police, arrested yesterday and committed to Castle Thunder a notorious personage named Wm. H. Murphy, formerly a Captain in the 1st La. regiment, and latterly a well known substitute agent. He is held for trial before the Court-Martial now in session.