How many movies have L. Frank Baum and Violet MacMillan collaborated on?

They have worked on 3 movies together! Their first movie together was The Magic Cloak of Oz (1914) while their highest rated movie together was His Majesty, the Scarecrow of Oz (1914). They have not worked together since His Majesty, the Scarecrow of Oz (1914). They are most known for their adventure films together.