The Central Railroad Company of New Jersey operated a main line between New York and Scranton with numerous branches within the state of New Jersey. It was one of the more important anthracite-carrying railroads, with important commuter and terminal facilities in the New York area. The collection primarily consists a set of incomplete minutes of parent, predecessor, and subsidiary companies.

The Delaware, Lackawanna & Western Railroad was one of the largest and most prosperous anthracite mining and transporting companies in Pennsylvania. Their records consist of minutes of the DL&W and its two direct predecessors.

The Lehigh Valley Railroad Company was one of the major anthracite railroads and formed a secondary trunk line between Jersey City, New Jersey and Buffalo, New York. Their records consist of minute books, corporate histories, voluntary reorganization plans, and an illustrated brochure on Claremont Terminal.