Contents include photographs of Union Pacific Locomotives, two 2 diagrams, a paper reviewed and accepted for publication ‘An 8500-Horsepower Gas Turbine Locomotive’, a report on a visit to the Union Pacific Railroad Company, a letter dated 2 January 1964 to Hughes from Union Pacific Railroad Company requesting information for annual report with a copy of the report on GT3 for year 1961 is attached and another letter dated 31 January 1963 to Hughes from Union Pacific Railroad Company regarding information requested about the experimental coal fired GTE locomotive.