Café Royal Cocktail Book by W. J. Tarling (1937, p.228)

1 unitegg — Eggbase
1 partspirit — Spirit of choicebase
1 glassmilk — Hot Milkdilution
nutmeg — Nutmegother
1 tablespoonsugar — Sugarsweetener
  1. Beat the egg and sugar together, add the spirit, serve in a tumbler with hot milk, and grate nutmeg on top.