The Haunting Symphony (1916)

Neurologist and hypnotist Dr. Andrew Smiley is the guardian of wealthy siblings Wilfred and Marcie Redmond. Smiley wants to marry Marcia, as he desperately needs money, but when he proposes to her, she rejects him. Smiley has a secret lover, Sarah Kayton, the head nurse of his sanatorium, and she has borne him a son, Paul Kayton, who is Smiley's secretary, unaware that his boss is the father. Smiley devises a plan to have Marcia adjudged insane and take her fortune. He almost succeeds but at the last-minute he fails.