Russell Swanson, one of the few persons willing to pursue the walls in the field, estimates that all the walls strung together would run for at least 20 miles. Naturally, time and civilization have destroyed some of the walls, but what remains is most impressive. The searches of property records going back to the Gold Rush and the studies of Spanish mission records give no hints of who built the walls or why. Evidently they are centuries old, possibly prehistoric. They appear to serve no practical purpose.
Scientists seem to show no interest in the walls.
I think what you're getting is an indication that there isn't any academic work in it. Additional mysterious walls are now reported in Marin County across the Bay. William R. Corliss Other Sites of Interest SIS . Catastrophism, archaeoastronomy, ancient history, mythology and astronomy. Free resource for people thinking about working at home.