It was not until 1865 that the Great Eastern, then the largest ship in the world, succeeded in laying a cable across the Atlantic Ocean. A frenzy of cable-laying followed, and by 1871 punters in Calcutta could learn the result of the Derby no more than five minutes after the famous horse race was over. The scale of the British Empire and the dominance of British industry ensured that in 1890 nearly two-thirds of the telegraph lines in the world were owned by British companies, which controlled 97,000 miles of cables. But the influence of the system extended far beyond the British Empire.
