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.

Top Billed Cast

Corinne Griffith

Mary Boyne

Huntley Gordon

Dan Kinsolving

Harry Davenport

Septimus Kinsolving

Jack McLean

Sammy Boyne

Jack Ridgeway

Thomas Boyne