T. H. Hubbard to CPH, March 13, 1894, CPH Papers, ser. 1, r. 52.
Richard Olney to George Hoadly, May 19, June 19, 1894, Olney to George Hoar, June 8, 1894, Olney Papers, ct. 138, r. 49.
Speyers to CPH, Aug. 27, 1893, CPH Papers, ser. 1, r. 52.
CPH to Smith, Sept. 6, 13, 1893, N. T. Smith to CPH, Sept. 7, 1893, Speyer & Co. to CPH, Sept. 15, 1893, CPH Papers, ser. 1, r. 52.
Speyer & Co. to CPH, Aug. 23, 1893, CPH Papers, ser. 1, r. 52.