Shake with shaved or crushed ice and garnish with fruits as you see fit. Serve with a straw.
Another version popularized by Ted Haigh uses 2 oz Curaçao, 1 oz rum, and 1 oz brandy. For best historical accuracy, you can use Smith & Cross Rum, Pierre Ferrand 1840 Cognac, and PF Dry Curaçao.
Jerry Thomas, The Bartender's Guide