Café Royal Cocktail Book by W. J. Tarling (1937, p.233)

1 glassorange juice — Orange Juiceacid
4 dashGrenadine — Grenadinebase
1 dashSoda water — Soda Waterdilution
1 unitegg yolk — Yolk of an Eggother
  1. Serve in a medium size glass and add a dash of soda water.