H. T. Scott to CPH, June 24, 1892, CPH Papers, ser. 1, r. 50.
White to Hon. John Swift, Jan. 24, 1891, Correspondence Outgoing, box 4, Jan. 7, 1890-May 10, 1891, White Papers.
Figures from Southern Pacific Company, 1885-1911, box 2E460, Mahl Papers.
W. G. Curtis to CPH, Sept. 6, 1895, HEH Collection.
CPH to J. Kruttschnitt, Aug. 31, 1897, HEH Collection.