Harry MacElhone also claims credit for this classic cocktail, but only some of the time. In the earliest editions of his 1922 book  Harry's ABC of Mixing Cocktails , the recipe includes cognac, triple sec, and lemon juice, and he cited Pat MacGarry, a bartender at London's Buck's Club, as the Sidecar's originator. But in later editions of the book, MacElhone changed his tune and claimed the recipe as his own. However, this revision could be blamed on a revised recipe. The English version called for two parts cognac to one part triple sec (or other orange liqueur) and lemon juice, while the French version (MacElhone's) favors equal parts of this trio of ingredients.