Pinkerton, Personal Record, 188-89.
John H. White, Jr., The American Railroad Freight Car: From the Wood-car Era to the Coming of Steel (Baltimore : The Johns Hopkins University Press, 1993), 530.
The basic details come from W. E. Costello to C. G. Wheeler, June 1, 1890, Aug. 1, 1890, CPH Papers, ser. 1, r. 48. See also C. L. Cline to A. Manvel, Aug. 4, 1890, illegible, Law Department of AT&SF to J. D. Springer, Aug. 28, 1890, and CPH to Manvel, Sept. 19, 1890, CPH Papers, ser. 1, r. 48.
also Michael Grogan to CPH, June 7, 1891, CPH Papers, ser. 1, r. 49.