Café Royal Cocktail Book by W. J. Tarling (1937, p.180)

0.33 partCalvados — Calvadosbase
0.33 partScotch whisky — White Horse whiskybase
0.33 partGrand Marnier modifier
1 dashGrenadine — Grenadinesweetener
  1. Shake, pour into the glass, then add a dash of grenadine.

Invented by T. Pooley.