The Unknown Quantity
The Unknown Quantity1919
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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.
DirectorThomas R. MillsStudioVitagraph Company of America
| Actor | Role |
|---|---|
 Corinne GriffithMary Boyne | Mary Boyne |
 Huntley GordonDan Kinsolving | Dan Kinsolving |
 Harry DavenportSeptimus Kinsolving | Septimus Kinsolving |
 Jack McLeanSammy Boyne | Sammy Boyne |
| JJack RidgewayThomas Boyne | Thomas Boyne |
| FF.R. BuckleyPeter Kenwitz | Peter Kenwitz |