El asunto Tornasol
Alfredo Topolino is a Swiss expert in ultrasonics residing in Nyon, Switzerland, who appears in "The Calculus Affair". An acquaintance of Professor Calculus, he survives first an assault on his doorstep then the destruction of his house by Bordurian agents interested in Calculus's work. His manservant Boris works for the secret service of that country. His last name means "little mouse" in Italian.