The Dublin Mystery (Unabridged‪)‬

Baroness Emmuska Orczy was a Hungarian-born British novelist, who gained fame as a writer for
The Scarlet Pimpernel, which was extremely successful then and remains so today. She also created an archetype of popular mystery fiction: the armchair detective, as exemplified by "The Old Man in the Corner", a sleuth who is never mentioned by name and but who solves cases simply by "thinking them through", while leaving the gathering of evidence to others. "The Dublin Mystery" is one of the best of these stories.