Adams to Perkins, Sept. 8, 1885, UP, PO, OC, vol. 29, ser. 2, r. 25.
CPH to Hopkins, Aug. 25, 1873, LB, 4:162, box 21, Hopkins Collection.
Godkin to Villard, June 7, 1893, in William A. Armstrong, ed., The Gilded Age Letters of E. L. Godkin (Albany: State Univ. of New York Press, 1974), 446-48.
Mahl Memoirs, Huntington J-3, p. 8, box aE461, CPH 1882-1900, Mahl Papers.
CPH to Hopkins, Sept. 5, 1873, LB, 5:19, box 22, Hopkins Collection.
For these negotiations, see CPH to Hopkins, Feb. 7, 1873, March 8, 1873 (3 letters), March 10, 1873 (2 letters), March 11, 1873, May 3, 1873; CPH to Stanford, Feb. 19, 1873, April 7, 1873, April 30, 1873, Letters from Collis P. Huntington, 3:393-94, 403-409, 4:5-7, 15.
CPH to Stanford, Feb. 28, 1873, v. 3: 149, Box 21.
CPH to Hopkins, March 1, (two letters both) March 7, 1873, v. 3: 151, 169, 171, Box 21.
Alfred Cohen to CPH, April, 11, 1873, CPH to Hopkins, June 3, 1873, LB, 4:75, 89, box 21, Hopkins Collection.