Mahl Memoir, CPH 32-33, F-5, F-6, Harriman - Southern Pacific S-1, E. H. Harriman, R-1, R-2, R-3, Harriman - Characteristics, W-1, Mahl Papers.
Diagram no. 1, Southern Pacific Lines - Pacific System - Tonnage and rates per Ton-mile, 1885-1896, box 2E463, Mahl Papers.
Mahl Memoir, Southern Pacific Co., F-15, CPH, B-11, B-12, Mahl Papers.
Wm. Mahl, "The Relation That the Accounting Department of Railroads Should Bear to the Stockholders or Owners of the Property," May 27, 1892, box 2E 462, Mahl Papers.
L. M. Clement to Huntington, CPH Papers, ser. 1, r. 33.