H. Spencer to CPH, Aug. 23, 1893, CPH Papers, ser. 1, r. 52.
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.
C. F. Crocker to CPH, Oct. 5, 1893, CPH to Smith, Oct. 26, 1893, Lloyd and Wood to CPH, Oct. 9, 1893 CPH Papers, ser. 1, r. 52.
Mutual Life Insurance Company of New York, Nov. 6, 1893, PIC Records, ser. 1, Business and Legal Papers, JL001, box 6, f. 47.