This play's second act be
This play's second act begins with reflections on Shelley's verse and features a speech deriding a poet's responsibility to the people.  That speech is interrupted when one of the main characters hears a "tappin'" that portends death.  Later in the play a distraught wife complains that her husband never returned to Hilljoy Square from the Blue Lion pub.  During the first Act, Mr. Gallogher seeks out the protagonist and reads him a complaint letter to Mr. Dwyer, while a young man assures him that he awaits the call to action.  However, when the Auxiliary arrives, it is neither Tommy Owens nor the meek title character that put up any resistance.  Instead the most courageous tenement residents turn out to be the verbose Mrs. Henderson and the doomed Minnie Powell. For 10 points, identify this tragicomic play about Donal Davoren, who pretends to be the titular IRA assassin; a work by Sean O'Casey.
This play's second act begins with reflections on Shelley's verse and features a speech deriding a poet's responsibility to the people.  
The Shadow of a Gunman