The Eastern Telegraph Co.: System and its general connections. Chart of submarine telegraph cable routes, showing the global reach of telecommunications at the beginning of the 20th century
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Unknown author<span style="display: none;">Unknown author</span></div>
A.B.C. Telegraphic Code 5th Edition, via <a rel="nofollow" class="external text" href="http://www.atlantic-cable.com/Maps/index.htm">Atlantic-cable</a>