I don't know it and I can only find pix of the same era as yours.
"Arch Rock on Santa Catalina Island, with yachting party in the schooner Fleetwing in the water in the background, ca.1905":
http://commons.wikimedia.org/wiki/Fi...(CHS-1706).jpg
This one must be earlier, there's more rock at the base on the seaward side:
csulb