The Curse of Capistrano (The Mark of Zorro) by Johnston McCulley

The Curse of Capistrano is a 1919 novella by Johnston McCulley and the first work to feature the fictional character Zorro (zorro is the Spanish word for fox). After the enormous success of the 1920 film adaptation, The Mark of Zorro, the story was republished under that name. Prior to being published in novella form, The Curse of Capistrano appeared as five serialized installments in the pulp magazine All-Story Weekly.

[from Wikipedia]