Main Question or Discussion Point
I think it's amazing that by 1860s the industrial revolution was advanced enough to make huge commercial projects possible:
That was 150 years ago.The first commercially successful transatlantic telegraph cable was successfully completed on 18 July 1866. The lasting connections were achieved by the ship SS Great Eastern, captained by Sir James Anderson. Earlier transatlantic submarine cables installations were attempted in 1857, 1858 and 1865. The 1857 cable only operated intermittently for a few days or weeks before it failed.
The telegraph lines from Britain to India were connected in 1870 (those several companies combined to form the Eastern Telegraph Company in 1872).
Australia was first linked to the rest of the world in October 1872 by a submarine telegraph cable at Darwin. This brought news reportage from the rest of the world.