Add the Cointreau, Bénédictine, and bottom half of rosemary sprig to a mixing glass and muddle. Add Bushmills and ice, then stir and fine-strain over one large cube into a chilled rocks glass. Garnish with the tip of the rosemary sprig.
David Slape named this drink after the posh Parisian hotel where Irish scribe and spirits devotee Oscar Wilde spent his last years. —David Slape, Spring 2008