In part these are the changes traced in William Cronon, Nature's Metropolis: Chicago and the Great West (New York: Norton, 1991).
CPH to Stanford, Dec. 16, 1871, LB, 1:197, box 1, Hopkins Collection.
Robert A. Sauder, "The Impact of the Agricultural College Act on Land Alienation in California," Professional Geographer 36 (1984): 28-39.
Khaled Bloom, "Pioneer Land Speculation in California's San Joaquin Valley," Agricultural History 57 (July 1983): 297-307.
David Lavender, The Great Persuader: The Biography of Collis P. Huntington (Niwot: Univ. Press of Colorado, 1998), 49, 140, 167.
David Igler, Industrial Cowboys: Miller and Lux and the Transformation of the Far West, 1850-1920 (Berkeley: Univ. of California Press, 2001), 10-12, for speculators 65-83.
See, e.g., James B. Hedges, "The Colonization Work of the Northern Pacific Railroad," Mississippi Valley Historical Review 13 (Dec. 1926): 31112.
David M. Emmons, Garden in the Grasslands: Boomer Literature of the Central Plains (Lincoln: Univ. of Nebraska Press, 1971), 25-46.
Richard C. Overton, Burlington West: A Colonization History of the Burlington Railroad (Cambridge: Harvard Univ. Press, 1941), 455.
Philip R. Smith, Improved Surface Transportation and Nebraskas Population Distribution, 1860-1960 (New York: Arno Press, 1981), 36-41.