Archival objects in this container: Field Book 222 - WO 4490 - Grades, Cross Sections, Elevations, 1950 Field Book 63 - Valley to Las Vegas Airport, 1949-1953 Field Book 14 - Bridges Daggett to Las Vegas, undated Field Book 93 - Roach to Las Vegas Signal Locations, 1943 Field Book 227, 1951-1952 Index cards - alphabetical - boxed, undated Field Book and Drawing Records, 1928-1931 Book - "The Postal Code (1901 Telegraph-Cable)" - pocket book of codes and ciphers, 1901 Las Vegas Field Book Transmittals 278 and 279, 1958-1959