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The film's opening title card reads: "The Whistle at Eaton Falls A Drama of Real Life." In the credits of the print viewed, the credit for "Additional Dialogue" was partially illegible, reading only "Lee ___" or "Leo____." Although the exact credit has not been determined by other contemporary or modern sources, it is possible that the name was Leo Rosten, who had previously co-written a Louis de Rochemont film. The Whistle at Eaton Falls marked one of silent-film star Dorothy Gish's rare film appearances. It was her first film in five years and her second-to-last before her permanent retirement in 1963. The film was director Robert Siodmak's last film to be shot in the United States. His remaining films were completed in Europe. The picture was shot on location in Portsmouth, NH, near producer Louis de Rochemont's home town. According to a November 1950 New York Times article, five different locations were utilized to create the film's factory, including one in Exeter, NH, another in Dover, NH and the interior of a plastics factory in Boston, MA. Rev. Robert A. Dunn and John Farrell were Portsmouth locals who had acted in Lost Boundaries, a 1949 DeRochemont production.