Sylvia Langdon is the protagonist and Arthur Comstock is the antagonist in the 1921 American silent movie, The Invisible Fear.
The Invisible Fear is a lost 1921 American silent mystery film directed by Edwin Carewe and starring Anita Stewart. As described in a film magazine, Sylvia Langdon (Stewart) is engaged to Bentley Arnold (Forrest). Her hand is also sought by Arthur Comstock (McGrail), a nephew of John Randall (Crane), who is a partner of Marshall Arnold (Morse). She is transfixed with horror at the sight of him and runs to her room where she finds the candlestick on her dresser. She gives a party on her birthday at which Arthur Comstock appears. 
