News releases, correspondence, newsclippings, publications, and ephemera related to a particular topic. Topics include general historical information about the road and about events having an impact upon it (e.g. the Civil War), as well as people and places that are historically significant to the history of the company (e.g. Abraham Lincoln, Casey Jones, R.B. Mason). There is also some information on specific railroad cars, such as the car equipped with an exhibit on the history of the IC, that went on tour in the company's centennial year; in addition to files about the Green Diamond and the Panama Limited.