Plays:
* The Woman of the Mystery (1897) - A melodramatic play that was a major success for De Mille.
* Strongheart (1903) - Another successful melodrama set in the American West.
* The Warrens of Virginia (1907) - A historical drama set during the American Civil War.
* The Land of Promise (1914) - A play about a young woman who travels to the American West in search of her dreams.
Screenplays:
* The Squaw Man (1914) - De Mille's first screenplay, a Western starring Dustin Farnum. This was also the first film directed by his brother, Cecil B. DeMille.
* The Cheat (1915) - A melodrama starring Fannie Ward.
* The Woman God Forgot (1917) - A dramatic film about a woman who is abandoned by her lover.
* The Whispering Chorus (1918) - A mystery film starring Mabel Normand.
* The King of Kings (1927) - A biblical epic directed by Cecil B. DeMille.
Other Works:
De Mille also wrote several novels, including:
* The Forest Ranger (1906)
* Strongheart (1907)
He was also a successful lyricist, writing songs for several Broadway productions.
Henry Churchill De Mille was a significant figure in American theater and cinema. He was known for his melodramatic and romantic stories, and he was a pioneer in the development of the American film industry.