Il Barista Guida del Barman by Mazzon Ferruccio (1920, p.17)

0.75 cocktail glassAbsinthe — absinthe svizzerobase
2 teaspoonsugar — zuccherobase
5 dropAngostura bitters — angosturabitter
2 teaspoonquinquina modifier
  1. Place 5 pieces of ice in the mixing glass.
  2. Add the sugar, Angostura, quinquina, and Swiss absinthe.
  3. Stir well, strain into a cocktail glass, and serve with straws.

Ice: Ice cubes