The F.R.S. citation read:

Srinivasa Ramanujan, Trinity College, Cambridge. Research student in Mathematics Distinguished as a pure mathematician particularly for his investigations in elliptic functions and the theory of numbers.

Thanks to the unstinted efforts of Hardy, who did his best to get Ramanujan due recognition, he was elected a Fellow of the Royal Society of London in February 1918. Reproduced here, is an excerpt from the Records of the Royal Society, dated December 18, 1917 (a copy of this document is an exhibit in the Ramanujan Museum in Royapuram, Madras).