Exhibit 4

Include studies, awards, statements, statistical data, photographs, and other documentation relating to the firemen manning issue, working conditions on the railroads, accidents, labor costs, the job content of train service employees and engineers, and testimony rebutting union arguments. Substantive documents relate to the New York Central System, the Atchison, Topeka and Santa Fe Railway, the Louisville and Nashville Railroad, the Netherlands Railways, the Canadian Pacific Railroad, the Gulf, Mobile, and Ohio Railroad, the Baltimore & Ohio Railroad, the Boston and Maine Railroad Company, the Illinois Central Railroad, the Great Northern Railway, and the Pennsylvania Railroad, among others.