dash of yellow Chartreuse or Grand Marnier or Curacao (your choice)
Fill a mixing glass with cracked ice. Add the Whiskey, juice and syrup. Shake and pour into a Highball glass. Top off with Club Soda (if you wish) and float that dash of Chartreuse (or Grand Marnier or Curacao) on top. Do not stir.
Fill a mixing glass with ice and add all the ingredients except Club Soda. Shake and strain into a highball glass filled with ice. Top off with Club Soda and garnish with a slice of Orange.