Gates to Speyer & Co., Aug. 17, 1880, CPH Papers, ser. 2, r. 12.
CPH to Crocker, Jan. 6, 1881, CPH Papers, vol. 77, ser. 2, r. 13.
CPH to Crocker, March 14, 30, 1883 CPH Papers, vol. 30, ser. 2, r. 6.
CPH to Speyer & Co., Jan. 6, 1881, CPH Papers, vol. 74, ser. 2, r. 13.
CPH to Speyer & Co., Jan. 6, 1881, CPH Papers, vol. 13, ser. 2, r. 13.
Speyer & Co. to CPH, Dec. 15, 1883, CPH Papers, vol., ser. 1, r. 34.
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.