Rory Sutherland Rory Sutherland

Video calls are the new penny post

iStock 
issue 24 April 2021

Dear Sir, I beg to introduce myself to you as a clerk in the Accounts Department of the Port Trust Office at Madras on a salary of only £20 per annum. I am now about 23 years of age. I have had no university education but I have undergone the ordinary school course… I have made a special investigation of divergent series in general and the results I get are termed by the local mathematicians as “startling”.

This was the opening of the letter written by the Indian maths prodigy Srinivasa Ramanujan to Professor G.H. Hardy at Trinity College, Cambridge in January 1913.

The penny post was the first network where the value to the user was the same no matter where they were

Now, vulgar consumerist that I am, my first thought on reading this letter was obviously to ask: ‘How much did it cost to send?’ Thanks to the internet, the answers to such questions are easy to find.

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