Fourth Annual Report of the California Baord of Railroad Commissioners (1883), 129-133.
William Deverell, Railroad Crossing: Californians and the Railroad, 1850-1910 (Berkeley: University of California Press, 1994), 59-60.
Alexander Callow, Jr., "San Francisco's Blind Boss," The Pacific Historical Review, 25 (Aug., 1956), 261-271.
Callow, San Francisco's Blind Boss, 261-71.
Klein, Union Pacific, 473.
Kimball to S. R. Callaway, March 17, 1886, enclosure with Callaway to Adams, March 18, 1886, UP, SG2, ser. 1, box 34, f. 1: Callaway.
Kimball to S. R. Callaway, March 22, 1886, enclosure with Callaway to Adams, March 23, 1886, UP, SG2, ser. 1, box 34, f. 2: Callaway.
Traffic Manager to Editor of Railway Age, Jan. 7, 1887, Van Horne LB, 20(1):4849, vol. 3.
Memorandum, c. Oct. 1886, Van Horne LB, 18 (2), vol. 3.
Adams to Hallgarten & Co., March 1, 1886, UP, PO, OC, vol. 34, ser. 2, r. 29.