L. U. Reavis, An International Railway to the City of Mexico: An Address by L. U. Reavis (St. Louis: Printed by Woodward, Tiernan & Hale, 1879), in Pamphlets, Railroads of Mexico, vol. 2, no. 10.
Ellis P. Oberholtzer, Jay Cooke: Financier of the Civil War, 2 vols. (Philadelphia: George W. Jacobs, 1907), 2:295.
Emily Brodman, a research assistant at Stanford, has created a data base of the directors of the Northern Pacific, Missouri Pacific, Mexican Central, Union Pacific, Chicago & Northwestern, Atchison, Topeka and Santa Fe, the Chicago Burlington and Northern, Chicago Burlington and Quincy, the Burlington and Missouri (NE) and the Burlington and Missouri (IA), the Atlantic and Pacific. She traced the networks using a Pajak program to reveal the relationships of directors with multiple roads. It is available on the Spatial History Project website at Stanford.
"Patterns of Change in Railroad Company Board Members," 1872-1894, Spatial History Project, Stanford Univ.