[2] In Frankfurt, Germany, she wrote her first hit play from start to finish in two hours titled, Sintram of Skagerrak.
Cowan's inspiration for writing this play was hearing Frederick Lamond’s piano recital of Chopin.
These were titled The State Forbids, In the Morgue, Playing the Game, The Moonlit Way, The Wonder of the Age, The Honor of America and Pomp, respectively.
The film was described by the Exhibitors Herald as heavily dramatic but with frequent and smartly placed bits of humor dispersed within it.
[4] This successful film led to Cowan’s writing of numerous others, in which she worked with directors such as Harry Garson and Cecil B.
[5] The film starred Gloria Swanson and Bebe Daniels and depicted the story of a man's marriage trials and tribulations between his first and second wives.
She was joined in her time by two other prominent women writers in the industry, Frances Marion and June Mathis.