Landscape Architect, Los Angeles Board of Park Commissioners, Los Angeles, CA, c. 1913-1914. Cox propduced plans for Los Angeles public park buildings c. 1913-1914. The California Index compiled by the Los Angeles Public Library indicated: "Noted as landscape architect for the Los Angeles Board of Park Commissioners; prepares sketches for 1-story mission style clubhouse to be built in Griffith Park." Southwest Builder and Contractor and Manufacturer, 04/19/1913, p. 17, col. 1." Another card read: "L.D. Cox, landscape architect of the park department, has proposed preliminary plans for proposed speaker's stand and comfort station to be built at Exposition Park. The building will be fireproof construction." Southwest Contractor and Manufacturer, 07/11/1914, p. 12, col. 2."