CPH to Crocker, April 12, 1878, CPH Papers, ser. 2, r. 6.
CPH to C. Crocker, May 17, 1871, Letters from Collis P. Huntington, 3: 275.
Crocker to Huntington, Jan. 22, 1878, CPH Papers, ser. 1, r. 14.
CPH to Stanford, Oct. 25, 1871, Huntington Letters, 3:291.
Testimony of Leland Stanford, Aug. 10, 1887, PRC, 6:3161-200.
William Mahl, Memoir, L.E.M. 3, B-15, Mahl Papers.
CPH to Hopkins, July 18, 1876, LB, 9:57, box 24, Hopkins Collection.
David M. Jordan, Roscoe Conkling of New York: Voice in the Senate (Ithaca: Cornell Univ. Press, 1971), 413, 417.