Café Royal Cocktail Book by W. J. Tarling (1937, p.199)

lemon juice — Juice of 1/2 Lemon and 1/4 Grapefruitbase
1 liqueur glassChartreuse — Green Chartreusemodifier
1 unitegg white — White of 1 Eggother
  1. Shake and strain into cocktail glass.