Den Otter, Philosophy of Railroads, 175.
Lubetkin, Jay Cooke's Gamble, gives a thorough account of the Sioux and their resistance to the Northern Pacific's attempt to survey their route west of the Missouri and east of the Rockies, 80-267.
Lubetkin, Jay Cooke's Gamble, 80-267.
Cooke to Windom, July 20, 1871, Northern Pacific, Letters no. 1 (LB), Jan. 19, 1870, Sept. 27, 1871, Cooke Papers.
Duane Swanson, The Northern Pacific Railroad and the Sisseton-Wahpeton Sioux: A Case in Land Acquisition (M.A. thesis, Univ. of Delaware, 1972), 24, 27, 29, 31, 33-36.
Whether Cowen was paid is uncertain, but negotiations moved forward.
See Duane Swanson, The Northern Pacific Railroad and the Sisseton-Wahpeton Sioux: A Case in Land Acquisition (M.A. thesis, Univ. of Delaware, 1972), 41, 43-44, 48-54.
George Becker and James Smith Jr. to Cooke, Sept. 5, 1872,; Jay Cooke to Brother Harry, May 24, 1872; Cooke to Cass, March 17, 1873, Cooke to B. F. Wade, March 22, 1873, Cooke to Maj. Benj. Thompson, March 22, 1873, LBs, all in Cooke Papers.