1830's, 1850's, 1869 (1 ene 1830 año – 1 ene 1869 año)
Descripción:
 In the 1830's it took as long as 2 years for a British correspondent to receive a reply to a letter sent to India by sailing ships. By the 1850's after the introduction of steamships, correspondence could make the round-trip between London and Bombay in 4 months. After the opening of the Suez Canal in 1869 steamships traveled from Britain to India in less than 2 weeks 
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fecha:
1 ene 1830 año
1 ene 1869 año
 ~ 39 years