Hopkins to CPH, Feb. 15, 1867, E. B. Crocker to CPH, Feb. 12, 25, 1867, Stanford to CPH, Feb. 8, 1867, CPH Papers, ser. 1, r. 1.
Crocker to CPH, N.Y. June 16, 1868, box 3, f. 5, Stanford Papers.
Klein, Union Pacific, 67-68.
Bain, Empire Express, 211.
Johnson and Supple, Boston Capitalists, 203.
"Patterns of Change in Railroad Company Board Members, 1872-1894," Spatial History Project, Stanford Univ.
"Distribution of Union Pacific Stockholders by City (1869)", Spatial History Project, Stanford Univ.