Backdrop image for movie The Unknown Quantity

The Unknown Quantity (1919)

Mary Boyne, who made shirts at four dollars a week, had no place for love in her life - only despair and hate for the son of the man who had plunged her family into deepest distress. Peter Kenwitz loved Mary, but because he was a mathematician and a pessimist by trade, his love was as hopeless as her chance for happiness.

  • Drama

Top billed cast

  • Photo of Corinne GriffithCorinne GriffithMary Boyne
  • Photo of Huntley GordonHuntley GordonDan Kinsolving
  • Photo of Harry DavenportHarry DavenportSeptimus Kinsolving
  • Photo of Jack McLeanJack McLeanSammy Boyne
  • Photo of Jack RidgewayJack RidgewayThomas Boyne
  • Photo of F.R. BuckleyF.R. BuckleyPeter Kenwitz

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