
The Unknown Quantity
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.
The Unknown Quantity
April 14, 1919
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Cast (6)

Corinne Griffith
Mary Boyne

Huntley Gordon
Dan Kinsolving

Harry Davenport
Septimus Kinsolving

Jack McLean
Sammy Boyne

Jack Ridgeway
Thomas Boyne

F.R. Buckley
Peter Kenwitz
Crew (3)
Directing

Thomas R. Mills
Director
Writing

O. Henry
Story

G. Marion Burton
Writer