"The absent-minded coterie" is a crime short story written in 1906 by Scottish writer Robert Barr. It features French detective Eugène Valmont, born out of a compilation of short stories titled "The triumphs of Eugène Valmont", originally published in 1904 and 1905 in the Saturday Evening Post. The story tells of a cunning scam devised by crooked counterfeiters. Of course, Valmont will eventually discover the truth.
The absent-minded coterie is widely recognised as one of the best crime short stories of the time. A gem of a book!