Mahl Memoir, General Remarks, N-1, Mahl Papers.
Mahl Memoir, Southern Pacific Co., F-12, Mahl Papers.
Mahl Memoir, Harriman--General O-6, Mahl Papers.
J. T. Mahl to William Mahl, Sept. 23, 1895, William Mahl to J. T. Mahl, Jan. 30, 1899, Mahl to Father, Feb. 7, 1899, J. T. Mahl to Father, March 7, 1899, box 2E460, Mahl Papers.
Mahl Memoir, Harriman--General, O-6, Mahl Papers.