Mr Bottacetti

In the short story The Voice in the Dark, Mr Bottacetti was young italian man who Mr Satterthwaite and the Barron sisters had been acquainted with in their youth. They had met him in Brighton, and after his boat had capsized Beatrice had nicknamed him Mr Boatupsetty. Satterthwaite used this question to test a spirit who claimed to be Beatrice during a seance, since no one else could know this detail.