Salmon Chase to J. Cooke, Nov. 21, Dec. 16, 1861, Cooke to Chase, Nov. 5, 1861, r. 18.
Chase to J. Cooke, Feb. 2, 7, 9, March 7, 8, 22, 1862, J. Cooke to Chase, Feb. 8, March 10, 22, 1862, Chase Papers, r. 19.
Cooke to Chase, June 28, 1862, Cooke Papers.
Chase to Cooke, Nov. 13, 1862, Chase Papers, r. 23.
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, 1:273-75.
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.
Bain, Empire Express, 153-56.