Scope and Content Single pocket expanding folder containing the following documents:1. Bound typescript, "Reports and Comments: D.E. Hughes, November 30, 1915, August 12, 1931, January 16, 1936," including "Report of D.E. Hughes, November 30, 1915," 83 pp with narrative discussion of earlier surveys of San Pedro Harbor surveys, especially noting the limits of their accuracy and sources of their errors, with some tables (1915), "Report of D.E. Hughes, August 12, 1931, calculations," 9 pp of...