Café Royal Cocktail Book by W. J. Tarling (1937, p.70)

0.33 partbrandy — Courvoisier brandybase
0.33 partrum — Daiquiri rumbase
0.33 partgrapefruit juice — fresh grapefruit juicegarnish
1 dashcreme de cacao modifier
  1. Shake.

See also: Curzon Street