Telegraph — Audiobooks
Cyclopedia of Telephony and Telegraphy, Vol. 1 A General Reference Work on Telephony, etc. etc.
by American School of Correspondence
Cyclopedia of Telephony and Telegraphy, Vol. 2 A General Reference Work on Telephony, etc. etc.
by American School of Correspondence
Samuel F. B. Morse, His Letters and Journals In Two Volumes, Volume I.
by Samuel Finley Breese Morse
Masters of Space Morse and the Telegraph; Thompson and the Cable; Bell and the Telephone; Marconi and the Wireless Telegraph; Carty and the Wireless Telephone
by Walter Kellogg Towers
Samuel F. B. Morse, His Letters and Journals In Two Volumes, Volume II
by Samuel Finley Breese Morse