A collection amassed by a retired conductor successively employed by the Pennsylvania Railroad, Penn Central, Conrail and Amtrak. It consists partly of company publications and documents collected on the job, and partly of advertisements, timetables, brochures, maps and other railroadiana from many different companies bought from dealers and other collectors. It is particularly useful for the Amtrak manuals relating to things like consumer satisfaction, employee health and safety and equipment maintenance.

Consists of reports, legislation, and hearings related to the bankruptcy and reorganization of select railroad lines, most of which Langdon played a major role. Subseries A comprises a series of preliminary reports from the 1930s and 1940s and covers regulations and law related to major freight carriers throughout the United States, as well as reports on the status and trends of various industries crucial to the success of motor, water, and rail freight carriers. Contained in Subseries B is a smaller amount of material dealing with the ICC's reorganization plan for the Erie Railroad in 1940. Langdon’s involvement with the Chicago, Rock Island and Pacific Railroad is documented in Subseries C, and includes testimony, ICC dockets, and other material related to the prospective merger of Rock Island with the Union Pacific and the former’s potential to develop into a profitable line. There is also correspondence between Langdon and Maury Klein, a Hagley fellow, regarding the Rock Island non-merger. Subseries D consists of material from Langdon’s effort to revitalize the bankrupt Penn Central Transportation Company (Penn Central). These include prospective reports, Langdon’s deposition regarding the company’s valuation and reorganization, as well as testimony from the valuation proceedings. Some maps are included and highlight lines to be acquired by Penn Central and other carriers. There are also several reports discussing Penn Central’s reorganization and the need for extensive financial existence from the government. Lastly, Subseries E contains reports touching on the problems of the Conrail organization, including inventory, its financial situation, and performance reviews. Other reports cover Conrail’s profitability, freight statistics, and operational comparisons with other freight carriers.

The Consolidated Rail Corporation (Conrail) was incorporated in October 1974. It was formed under the auspices of the United States Railway Association, a quasi-public agency established for the purpose of solving the problems of bankrupt railroads in the Northeast and Midwest. The portfolio contains sixty-eight examples of proof copies of advertisements created by the advertising agency of Ogilvy & Mather, Inc. (later Ogilvy & Mather Partners, Inc.), between Conrail's start up in April 1976 and 1990. There are also two pages of proxy instructions that appear to date from the first CSX takeover bid in 1997.

The Consolidated Rail Corporation (Conrail) was incorporated in October 1974. It was formed under the auspices of the United States Railway Association, a quasi-public agency established for the purpose of solving the problems of bankrupt railroads in the Northeast and Midwest. The Conrail photograph collection consists of a large number of images from its company files, but the majority of the material comes from its predecessor companies: Pennsylvania Railroad and Penn Central Transportation Company. These items are predominanatly composed of photographs, negatives, transparencies, lantern slides, and films.