In 1874 Todhunter was elected as an honorary fellow of St John's College but he was taken ill in 1880 and, from that time on, his health deteriorated.
Sa 1874 Todhunter ay elected bilang isang honorary fellow ng St John's College ngunit siya ay kinuha sama sa 1880, at mula sa oras na iyon, ang kanyang kalusugan deteryorado.