''The Unknown Quantity'' was a 1919 American silent directed by Thomas R. Mills produced and distributed by the

Vitagraph Company of America Vitagraph Studios, also known as the Vitagraph Company of America, was a United States motion picture studio. It was founded by J. Stuart Blackton and Albert E. Smith in 1897 in Brooklyn, New York, as the American Vitagraph Company. By 1907, ...

. It is based on the 1910

short story A short story is a piece of prose fiction that typically can be read in one sitting and focuses on a self-contained incident or series of linked incidents, with the intent of evoking a single effect or mood. The short story is one of the oldest ...

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 Corinne Griffith (née Griffin; November 21, 1894 – July 13, 1979) was an American film actress, producer, author and businesswoman. Dubbed "The Orchid Lady of the Screen," she was widely regarded as one of the most beautiful actresses of the ...

- Mary Boyne *

Huntley Gordon Huntley Ashworth Gordon (October 8, 1879 – December 7, 1956) was a Canadian actor who began his career in the Silent Film era. Profile Gordon was born in Montreal, Quebec, educated in both Canada and England. He had various jobs including w ...

- Dan Kinsolving *

Harry Davenport Harry Davenport may refer to: * Harry Davenport (actor) (1866–1949), American film and stage actor * Harry Davenport (footballer) (1900–1984), Australian footballer * Harry J. Davenport (1902–1977), Democratic Party member of the U.S. House ...

- Septimus Kinsolving * Jack Ridgeway - Thomas Boyne * Frederick Buckley - Peter Kenwitz * Jack McLean - Sammy Boyne

References

External links

* American black-and-white films Vitagraph Studios films 1919 films American silent feature films Lost American films American silent short films Adaptations of works by O. Henry 1910s American films 1919 lost films {{short-silent-film-stub