Subject
5 free books about telegraph, free to read online. Chapter 1 of any book is free, no account needed.
Cyclopedia of Telephony and Telegraphy, Vol. 1 A General Reference Work on Telephony, etc. etc.
American School of Correspondence
Samuel F. B. Morse, His Letters and Journals In Two Volumes, Volume II
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
Walter Kellogg Towers
Cyclopedia of Telephony and Telegraphy, Vol. 2 A General Reference Work on Telephony, etc. etc.
Samuel F. B. Morse, His Letters and Journals In Two Volumes, Volume I.
