This author included a soliloquy about the "Fearful key, which locks behind me the prisonhouse of life" in a play in which a character picks up a guitar and sings a dialogue between Brutus and Caesar. Taking advantage of a superstition, one of this author's title characters freely paces the corridors of a castle in the mask and habit of a monk. The protagonist of another play by this author refuses to harbor the murderer Duke John Parricida and personally ferries a fugitive across a stormy lake. The antagonist of that play by him commands everyone to bow before a (*) cap he places on a pole. This author wrote a play in which the title character seals his own fate by rejecting the Princess de Eboli, because he is in 
This author included a soliloquy about the "Fearful key, which locks behind me the prisonhouse of life" in a play in which a character picks up a guitar and sings a dialogue between Brutus and Caesar. Taking advantage of a superstition, one of this author's title characters freely paces the corridors of a castle in the mask and habit of a monk. The protagonist of another play by this author refuses to harbor the murderer Duke John Parricida and personally ferries a fugitive across a stormy lake. The antagonist of that play by him commands everyone to bow before a (*) cap he places on a pole. This author wrote a play in which the title character seals his own fate by rejecting the Princess de Eboli, because he is in love with his father's wife Elizabeth of Valois, as well as one in which Amalia's murder further drives a wedge between the brothers Franz and Karl von Moor. In his best-known play, a man foils Gessler by shooting an apple off his son's head. For 10 points, name this author of historical plays such as Don Carlos, The Robbers, and William Tell.
This author included a soliloquy about the "Fearful key, which locks behind me the prisonhouse of life" in a play in which a character picks up a guitar and sings a dialogue between Brutus and Caesar.