Chapter 4: Spatial Politics, footnote 126, page 173 Ch4 fn. 126 p. 173 Tags: Pure Citation, Published Letters/Correspondence, Technology, Spatial Relations S. R. Callaway to Adams, Oct. 19, 1886, UP, RG 3761, box 35, f. Aug. 11 - Oct. 86, LB, 53. S. R. Callaway to Adams, Jan. 8, 1887, UP, RG 3761, box 47, f. 3;. Adams to Callaway, March 29, 1886, UP, PO, OC, vol. 33, ser. 2, r. 28. Testimony of Charles Francis Adams, April 29, 1887, PRC, 1:112.