Here are some interesting links related to telegraphy.
*“The Electromagnetic Telegraph” by J.B. Calvert
*”Distant writing” from Steven Roberts
www.telegraphlore.com from Greg Raven
http://atlantic-cable.com/ from Bill Burns
http://w1tp.com/ from Tom Perera
http://www.telegraph-history.org from John Casale
http://www.telegraph-office.com/ from Neal McEwen
http://telegraphmuseum.org/.. Porthcurno telegraph museum
http://www.sparkmuseum.com from John Jenkins
http://www.zianet.com/sparks/index.html from Russ Kleinman
http://www.n7cfo.com/ from Lynn Burlingame
http://www.vibroplexcollector.net/ from Randy Cole
http://www.telegraphkeys.com/ from Doug Palmer
And there is also my first website with (only) images of my telegraphs and some other apparatus:
http://www.telegraphsofeurope.net/ > courtesy of Greg Raven.
>>> Please let me know if you want to add yours and/or other interesting ones.