Combine all ingredients except the port, shake with ice, strain. Garnish with a rose petal.
Recipe is written as published; I prefer to use Tawny Port though the drink loses some of its red color
In The Savoy, this is a 1/4 part drink: OJ, Grenadine, French Vermouth, Brandy, with a dash of creme de menthe and a "little port wine" to top.
Essential Cocktail, Dale DeGroff, The Savoy Cocktail Book, pg 20