Edison, New Jersey, actually.
In 1912 Cecil B DeMille with Actor Dustin Farnum were making a film for Jesse Lasky and Sam Goldwyn. It was a western, they were going to film in Flagstaff, AZ, that year the rains came so De Mille wired the home office in New York and said they would head to Los Angeles where they rented a Barn out in the Valley and shot “The Squaw Man”.
So Flagstaff could have been Hollywood.