Jacqueline of Golden River

This could be straight from a classic Hitchcock film - a lady in danger who appears to suffer from amnesia, a man trying to solve it all with her, wanting to prove her innocence of the murder charge pinned on her; who is she? What did she do? What really happened, and why is her father in danger as well? Classic, adventurous and nail biting stuff by Victor Rousseau, published in 1919.