Roger Casement was a guest at a Johnson Club supper in 1896. As was Joseph Conrad.*
Conan Doyle’s short story, ‘The Fiend of the Cooperage’ was published in 1897. Doyle was a guest speaker at the Irish Literary Society, 13 February, 1897.
In the story, two men are isolated in the jungle and have only each other for company. ‘Dr Severall is a rank Radical and I am a good stiff Unionist’ They argue about Home Rule for two solid hours every evening.**
*John Stape, The Several Lives of Joseph Conrad, p.133.
** Jane Stanford, ‘Moriarty Unmasked: Conan Doyle and an Anglo-Irish Quarrel’, 2017, p.38.