You can trace the development of the San Fernando Valley by names on its streets. There's a Mayall near Chatsworth High School. Bill Robertson says, "Mayall Street was named in 1924 after the surveyor Robert Mayall."
Robertson is director of L.A.'s Bureau of Street Services. He says, "this one I find interesting 'cause it's one of the older name changes. Monogram Avenue was actually named for the Monogram homebuilders that were one of the major developers in the Valley boom right after World War II."
And what a boom it was. More than three-quarters of all the new subdivisions that sprang up across L.A. between 1945 and 1950 were located in the San Fernando Valley.