Memorandum, undated, unsigned, box 2, f. 20, Villard Papers.
Charles Francis Adams, "Which Will Quickest Solve the Railroad Question: Force bills or Public Opinion?" Oshkosh, Wisconsin, Sept. 3, 1875, in Charles Francis Adams, Railway Pamphlets, Stanford University Library, 7-11.
I. Leo Sharfman, Railway Regulation: An Analysis of the Underlying Problems in Railway Economics from the Standpoint of Government Regulation (Chicago: La Salle Extension Univ., 1915), 113.
Sharfman was an economist at the Univ. of Michigan.
The literature on this is enormous and starts with Leo Marx's classic, The Machine in the Garden: Technology and the Pastoral Ideal in America (New York: Oxford Univ. Press, 1964).
Henry T. Williams, ed., Pacific Tourist: Adams and Bishops Illustrated Trans-continental Guide of Travel, from the Atlantic to the Pacific Ocean: A Complete Travelers Guide of the Union and Central Pacific Railroads (New York: Adams & Bishop, 1881), 6-7.