Endnotes

¹ Telegram. Albert C. Barnes to Paul Guillaume, January 15, 1926. Albert C. Barnes Correspondence, Barnes Foundation Archives.

² Steven M. Bellovin. “Compression, Correction, Confidentiality, and Comprehension: A Look at Telegraph Codes.” (New York: Department of Computer Science, Columbia University, 2009).

³ Ibid.

⁴ Ibid.

⁵ W.A. Sheahan. Cipher Code of Words, Phrases, Names of Organizations and Titles of Their Officers, Names of Principal Railroads, Months, Days, Time of Day, Alphabet and Figures for Use of Organizations of Railway Employees in Telegraphic Correspondence. (Galesburg, Illinois: [American Railway Association] 1892).

⁶ Telegram. Albert C. Barnes to Paul Guillaume, December 19, 1925. Albert C. Barnes Correspondence, Barnes Foundation Archives.

⁷ Telegram. Paul Guillaume to Albert C. Barnes, January 13, 1927. Albert C. Barnes Correspondence, Barnes Foundation Archives.

⁸ Arboretum Bulletin of the Associates, vol 2, no. 13 (October 1938): 64.

⁹ Ibid.

¹⁰ Financial Publishing Company. The Adams Cable Codex, 11th ed. (Boston: Financial Publishing Company, 1925).

¹¹ Letter. Albert C. Barnes to Paul Guillaume, February 23, 1923. Albert C. Barnes Correspondence, Barnes Foundation Archives.

¹² Letter. Albert C. Barnes to Paul Guillaume, February 27, 1923. Albert C. Barnes Correspondence, Barnes Foundation Archives.