Hubbard to CPH, March 6, 1894, CPH to Hubbard, March 6, 1893, March 31, 1894, F. H. Davis to CPH, March 16, 1894, CPH Papers, ser. 1, r. 52.

E. Gates to CPH, April 5, 1894, CPH Papers, ser. 1, r. 53.