SHAKE all ingredients with ice and fine strain into chilled glass.
Lemon zest twist
If there is such a thing as a 'Rum Aviation', then this is surely it.
Recipe adapted from W.J. Tarling's 1937 'Cafe Royal Cocktail Book - Coronation Edition' in which Tarling credits this drink's creation to Harry Craddock, the then head bartender of the American Bar at London's Savoy Hotel.