STIR all ingredients with ice and strain into chilled glass (no ice).
Orange zest twist
This drink is so spirituous that it may well have finished Archibald off, but a least his last drink was a proper sharpener. Then again, the perceived health-giving herbal benefits of Fernet and Bénédictine combined in such a dosage would have perhaps got him back on his feet.
To be honest, we prefer this cocktail served on-the-rocks as the dilution takes the edge of the spirituous attack and opens the drink, releasing more of its delicate herbal complexity.