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.
Mahl Memoir, Southern Pacific Co., F-1, Mahl Papers.
Mahl Memoir, E. H. Harriman, O-3, O-4, O-5, Mahl Papers.
Mahl Memoir, P.I. Co., G-4, G-5, G-6, G-7, Mahl Papers.