Scope and Content 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,"...

Scope and Content Single pocket expanding folder containing ten envelopes, C-11 through C-22, each is labeled as "Book 'C,'" and each containing celluloid prints.C-11. "Ordinary high tide line, and mouth of San Gabriel River, by Los Angeles County Surveyor, 1897," blueprint and two negative photostats (undated)C-12. "Coast line and sloughs easterly of the San Gabriel River, Lippincott and Parker, 1904," blueprint and one print (undated)C-13. "US Engineer's map of 1908,"...