Speyer & Company to CPH, May 6, 1893, CPH Papers, ser. 1, r. 51.
Extracts from Letter received from L. Speyer Ellissen, May 12, 1893, CPH Papers, ser. 1, r. 51.
N. T. Smith to CPH, May 30, June 7, 17, 1893, CPH Papers, ser. 1, r. 52.
CPH to HEH, June 13, 1893, HEH Collection.
C. F. Crocker to CPH, June 19, 1893 CPH Papers, ser. 1, r. 52.