General Information
The Unknown Quantity is a motion picture produced in the year 1919 as a USA production. The Film was directed by Thomas R. Mills, with Corinne Griffith, Huntley Gordon, Harry Davenport, Jack Ridgeway, Frederick Buckley, in the leading parts. We have currently no synopsis of this picture on file; There are no reviews of The Unknown Quantity available.Bibliography - The Motion Picture News, 12 April 1919, pg 2354.
- The Moving Picture World, 12 April 1919, pg 273.
- Variety, 4 April 1919, pg 66.
- Wid's Film Daily, 18 January 1919, pg 393.