CPH to Hopkins, Sept. 27, 1873, LB, 5:111, box 22, Hopkins Collection.
David Pletche, Rails, Mines, and Progress: Seven American Promoters in Mexico, 1867-1911 (Ithaca: Cornell Univ. Press, 1958), 37, 48.
Plumb to George E. Church, Jan. 27, 1872, box 2, f. 20, Plumb Papers.
George Earl Church to Plumb, June 11, 1872, box 2, f. 21, Plumb Papers.
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.
CPH to Hopkins, Dec. 19, 1872, LB, 3:177, box 21, Hopkins Collection.
Goldsmith and Hart (sic) CPH, Oct. 22, 1878, CPH Papers, ser. 1, r. 15.