[770] W. B. Wilson, History of the Pennsylvania Railroad Company. Philadelphia, 1899.
[771] T. K. Worthington, Historical Sketch of the Finances of Pennsylvania. Publications of the American Economic Association, May, 1887.
[772] A. L. Bishop, The State Works of Pennsylvania. Publications of Yale University, New Haven, 1907.
[773] W. K. Ackerman, Historical Sketch of the Illinois Central Railroad. Chicago, 1890.
[774] J. H. Hollander, The Cincinnati Southern Railway: A Study in Municipal Activity. Johns Hopkins University Studies, January-February, 1894.
[775] E. A. Ferguson (Compiler), Founding of the Cincinnati Southern Railway; with an Autobiographical Sketch. Cincinnati, 1905.
[776] Charles S. Potts, Railroad Transportation in Texas. Bulletin of the University of Texas, Humanistic Series, March 1, 1909.
[777] P. Briscoe, The First Texas Railroad. Texas Historical Association Quarterly, Austin, 1904.
[778] Chicago, 1905.
[779] E. B. Hinsdale, History of the Long Island Railroad. New York, 1898.