CPH to Crocker, Feb. 4, 17, 1882, CPH Papers, vol. 29, ser. 2, r. 6.
Colton to CPH, Feb. 7, March 5, 1878, Octopus Speaks, 467, 477.
Colton to CPH, March 29, 1879, Octopus Speaks, 482.
Flagg to CPH, Nov. 15, 1878, CPH Papers, ser. 1, r. 16.
Testimony of Alfred Cohen, July 27, 1887, PRC, 4:2386, for full testimony, 2381-405.