Drop small dash of Herbsaint into a 3-1/2-ounce old-fashioned glass and swirl it around to coat the bottom and sides. Discard any extra. Combine sugar, bitters and cognac in a cocktail shaker or larger glass. Add a couple small ice cubes and stir well, don't shake. Strain cocktail into prepared old-fashioned glass. Twist lemon peel over glass, making sure a couple drops of the orange oil drop into the cocktail and then run it around the rim.