As you know, in 1906 the Los Angeles-Pacfic Railway petitioned the City to construct two single-bore tunnels; one ran up Hill from roughly First to Temple, the other from just above Temple to Sunset. They opened in September, 1909.
September 1913 saw the opening of a second bore on the southern part of the tunnel, a municipal project for pedestrians and private vehicle traffic. I put a nifty picture of the twin-bore tunnel in the book.
How often, though, do you see an image of the LAPR-built First-to-Temple single bore, shot between 1909 and 1913?
Well here you go.
Bunker Hill, Los Angeles 