CPH to HEH, Nov. 8, 1894, HEH to CPH, Nov. 12, 1894, CPH to W. W. Stow, Dec. 18, 1894, HEH Collection.
HEH to T. E. Stillman, April 27, 1895, T.E. Stillman to HEH, May 6, 1895, enclosures with B. A. Worthington to HEH, March 9, 1897, HEH Collection.
Most likely, since Henry Huntington knew that Fillmore was using detectives, he had someone inside Fillmore's office sending him copies of the reports.
John Custin? to J. A. Fillmore, Oct. 17, 1895, report of operative W.J.F., Oct. 16, 1895, HEH Collection.
San Francisco Call, June 10, 1895.