Miner and Unrau, End of Indian Kansas, 27-34.
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.
George Ward, Lewiston Mills, to H. L. Dawes, Nov. 28, 1866; Dawes to Ward, Nov. 29, 1866 (two letters), box 37, Credit Mobilier, Dawes Papers.
Oakes Ames, Receipt, Jan. 23, 1868, box 37, Credit Mobilier, Dawes Papers.
Receipt, $195.33, Feb. 10, 1868, Dawes to My Ever Dear Wife, June 11, 1868, receipt, June 11, 1868, Ames to Dawes, Oct. 30, 1871, box 37, Credit Mobilier, Dawes Papers.