Who narrated tombstone?

The film "Tombstone" was narrated by the character of a historian, played by actor Robert Mitchum. The narration provides a reflective overview of the events surrounding the infamous Gunfight at the O.K. Corral and the lives of its key figures, including Wyatt Earp and Doc Holliday. Mitchum's voice adds a sense of gravitas and historical context to the story.