![Mary Lawson's Secret Poster](https://image.tmdb.org/t/p/w500//yPyoDLNpYK6A0pw2cLxB8bprcLQ.jpg)
Mary Lawson's Secret
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April 1, 1917
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Drama
Featured Crew
Harry B. Harris
Director of Photography
John B. O'Brien
Director
Edwin Thanhouser
Producer
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Cast
![Charlotte Walker](https://image.tmdb.org/t/p/w300//foTYHkDoA5v8VaVC7a0Jy7KIkEA.jpg)
Charlotte Walker
Mary Lawson
![William B. Davidson](https://image.tmdb.org/t/p/w300//20RHbZvvujZFlR2B96i7oQaJ6w.jpg)
William B. Davidson
Dr. Brundage
![J.H. Gilmour](https://image.tmdb.org/t/p/w300//yLhvEwkbMcL9ThknOO3Z0EjCq4j.jpg)
J.H. Gilmour
Dr. Kirk
N.Z. Wood
Joe
Inda Palmer
Mary's Mother