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.
CPH to Hopkins, Jan. 3, 1873, LB, 3:93, box 21, Hopkins Collection.
Cohen to Ralston, Jan. 4, 1873, LB, 12:19, Hopkins to Ralston, Jan. 6, 1873, LB, 12:21, Ralston to Hopkins, Jan. 6, 1873, LB, 12:25, Hopkins to Ralston, Jan. 8, 1873, all in box 25, Hopkins Collection.
CPH to Hopkins, March 10, 1870, LB, 2:96, CPH to Hopkins, March 19, 1873, LB, 4: 27, box 21, Hopkins Collection.