Cooke to Moorhead, July 1, 1871, Northern Pacific, Letters no. 1 (LB), Jan. 19, 1870 - Sept. 27, 1871, Private Letters, Jay Cooke, p. 236, Cooke Papers.
Testimony of Wm. Moorhead, Sept. 18, 1874 (2:30 P.M.) in the District Court of the United States, Eastern District of Pennsylvania, In the Matter of . . . Jay Cooke & Co, Bankrupts (Philadelphia: Allen, Lane & Scotts, 1875), 779, Fahnestock Papers.
Larson, Cooke, 191-93, 195-97, facing 231
Fahnestock to Cooke, June 8, 1872, Fahnestock to Cooke and Wm. G., Sept. 7, 1872, box 3, f. 32, Fahnestock Papers.
Robin Winks, Frederick Billings: A Life (Berkeley: Univ. of California Press, 1991), 88-89, 193, 195.
Harnsberger, Jay Cooke and Minnesota, 80-81.
Jay Cooke Jr. to Jay Cooke, Aug. 20, 1872, LBs, Cooke Papers.
"Red River," Cooke to McCulloch, Sept. 4, 1871, Northern Pacific, Letters no. 1 (LB), Jan. 19, 1870 - Sept. 27, 1871, Private Letters, pp. 679-80.