Not named after the detective, I don't think! This is a long fruity Campari, made with 1.5 measures of Campari, 1.5 measure fresh orange juice, 3/4 measure fresh lemon juice and 1 measure of fresh lime juice, with about 1/2 a measure of gomme syrup. Shake and then serve over ice in a long glass, topped up with chilled tonic and a slice of orange and lime. Heaven. We had little crisp squares of buttery baked bread, topped with a duxelles of mushrooms with minced Parma ham mixed in, and baked until bubbling, to accompany it before our dinner of roast lamb and pumpkin pie.