Hart, Empire and Revolution, 52-53.
Plumb to Church, July 17, 1872, Church to Plumb, June 11, 1872, Plumb to Wm. Hunter, Aug. 23, 1872, box 2, f. 21, Plumb to Hamilton Fish, Aug. 15, 1873, box 2, f. 23; Plumb quote, Plumb to Horace Porter, Sept. 29, 1871, box 2, f. 19, Plumb Papers.
Rose Kingsley, South by West ed. with a preface by the Rev. Charles Kingsley (London: W. Isbister, 1874), 183.
Pletcher, Rails, Mines, and Progress, 41-51.
John S. Fisher, A Builder of the West: The Life of William Jackson Palmer (Caldwell, Idaho: Caxton Printers, 1939), 210, 217.
Kingsley, South by West 183, 225-26, and 207-31 in general.