Chase to Cooke, April 29, 1862, Cooke to Chase, April 30, 1862, Chase Papers, r. 20, Cooke to Chase, July 5, 1862, r. 21, Chase Papers.
Oberholtzer, Jay Cooke, 1:255-63.
Chase to Cooke, June 1, 1863, r. 27, Chase Papers.
Oberholtzer, Jay Cooke, 1:273-75.
Cooke to Chase, June 1, 1863, Chase to Cooke, June 2, July 8, 1863, r. 27, Chase Papers.
Gische, "New York City Banks," 21-67.
For other accounts of Congressional action see Maury Klein, The Union Pacific.
Arthur M. Johnson and Barry E. Supple, Boston Capitalists and Western Railroads; A Study in the Nineteenth-century Railroad Investment Process (Cambridge, Harvard University Press, 1967), 197.
Maury Klein, The Union Pacific: Birth of a Railroad, 1862-1893 (Garden City, N.Y. : Doubleday, 1987), 13-16.