Pletcher, Rails, Mines, and Progress, 67-69, 91.

W. to Plumb, April 15, 1873, box 2, f. 23; newspapers, Plumb to James Mackie, Oct. 12, 1873, box 2, f. 23, Edward L.; El congreso de la Union . . . Nov. 12, 1873, box 3, f. 25, Plumb to Hurlbert, Nov. 22, 1873, box 3, f. 25; Plumb to P. H. Sheridan, March 31, 1874, box 3, f. 26, all in Plumb Papers.

For continued attempts at charters in 1870s, see Hart, Empire and Revolution, 106-22.