This recipe is very similar to the one for the “Tale of Two Roberts” cocktail credited to Frank Caiafa of the Waldof-Astoria by Philip Greene in his excellent 2016 book *The Manhattan (The Story of the First Modern Cocktail)* [Sterling Publishing, 2016]:
2 oz Scotch
1 oz sweet vermouth
1/4 oz Bénédictine
2 dashes absinthe
Stir with ice, strain into a cocktail glass, lemon peel garnish.
It’s one of my very favorite libations (although I substitute 1 tsp Pernod for the absinth)