Notice that there are four lines. On the left, where the sign says “Espanol”, the branch offered Spanish speaking service. In the middle was general delivery and on the right box delivery. Around the corner to the far right was a door where daily newspapers were collected. By October 1849, more than 45,000 letters had piled up undelivered in this post office and the clerks had to barricade themselves in to protect themselves from the crowd.
Harry Twyford Peters (1881-1948), California on Stone (Garden City, N.Y.: Doubleday, Doran & Company, inc., 1935). Graphic Arts: Reference Collection (GARF) Oversize NE2310.C2 P4 1935q
Ted Morgan, A Shovel of Stars: the Making of the American West, 1800 to the Present (New York, NY: Simon & Schuster, 1995). Firestone Library (F) F591 .M865 1995