How many movies have Franklyn Hall and John B. O'Brien collaborated on?

They have worked on 13 movies together! Their first movie together was The Mexican's Faith (1910) while their highest rated movie together was The Bad Man's Last Deed (1910). They have not worked together since A Cowboy's Vindication (1910). They are most known for their western films together.

Role
First Pedestrian / Second Bartender (as Frank Hall)
Role
Man Outside Third Bar
Role
The Rancher's Daughter's Sweetheart
Role
The Scoundrel