Speyer & Co. to CPH, May 14, 1883, CPH Papers, ser. 1, r. 32.
Speyer Brothers to CPH, Sept. 1, 1883, CPH, ser. 1, r. 33.
Speyer Brothers to CPH, Sept. 1, 1883, CPH, ser. 1, r. 33.
CPH to Speyer & Co., Dec. 20, 30, 1882, CPH Papers, vol. 79, ser. 2, r. 13.
Speyer & Co. to CPH, Nov. 13, 1882, CPH Papers, ser. 1, r. 34.
Gates to Chambers, Jan. 8, 1885, CPH Papers, vol. 92, ser. 2, r. 15.
Also Gates to J. T. White, Jan. 31, 1885, Gates to A. N. Towne, July 15, 1885, C. Crocker to CPH, Dec. 10, 1883, no. 260, Crocker Papers.