Single pocket expanding folder containing ten envelopes, C-1 through C-10, each is labeled as "Book 'C,'" and each containing celluloid prints.

C-1. "Cerritos Slough location and topography, by Clark F. Miller, 1907," blueprint and two thin paper prints (1939)

C-2. "Contours easterly of San Gabriel River, by A.L. Sonderegger, 1905-06," blueprint and blueline print (undated)

C-3. "Traverse of three sloughs, by Henry Hancock, Easterly of San Gabriel River," blueprint (undated)

C-4. "(Portion) US Coast Survey Map, 1859," blueprint with six other prints (undated)

C-5. "(East portion) US Coast Survey Map, 1872," blueprint with four other prints (undated)

C-6. "(West portion) US Coast Survey Map, 1872," blueprint with negative photostat, paper and film negatives, and five other prints (undated)

C-7. "LA Terminal RR Surveys of 1890, (West portion)," blueprint with manuscript markings in red pencil

C-8. "LA Terminal RR Surveys of 1890, (East portion)," blueprint and two other prints (undated)

C-9. "Mouth of San Gabriel River, as shown on Senate document no. 18-55-1," blueprint with one positive and one negative photostat (undated)

C-10. "Cross sections along coast line, by Long Beach Harbor Dept, August, 1924," blueprint with negative photostat and envelope. "Field book 810, pages 30-45 incl., Harbor Dept. Long Beach, Vickers notes," envelope contains negative photostats of manuscript field notes from survey and manuscript pencil notes re survey (undated)