How many movies have Boyd Marshall and Philip Lonergan collaborated on?

They have worked on 5 movies together! Their first movie together was A Disciple of Nietzsche (1915) while their highest rated movie together was King Lear (1916). They have not worked together since King Lear (1916). They are most known for their drama films together.

Role
King of France
Crew
Adaptation
Crew
Screenplay