The Unknown Quantity is a lost 1919 American silent directed by Thomas R. Mills produced and distributed by the Vitagraph Company of America. It is based on the 1910 short story of the same name by O. Henry.Alan Globe, ed., The Complete Index to Literary Sources in Film (Bowker-Saur) 1999, 999.The Unknown Quantity at the American Film Institute: Catalog of Feature Films
Plot
A profiteer's son falls in love with one of his father's victims and secures the acquittal of her brother who was falsely accused of murder.
Cast Corinne Griffith as Mary Boyne Huntley Gordon as Dan Kinsolving Harry Davenport as Septimus Kinsolving Jack Ridgeway as Thomas Boyne Frederick Buckley as Peter Kenwitz Jack McLean as Sammy Boyne
References
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