Jack's Manual by J. A. Grohusko (1910, p.31)

lemon peel — lemon-peel sugaracid
8 egg yolksegg yolk — egg yolksbase
1 glassgin — May be left out.base
1 quartbarley wine — Bass & Co.'s Barley Wine or Strong Aleother
1 piececinnamon other
1 nutmegnutmeg — Grated.other
refined sugar — Beat with the yolks; more loaf sugar if needed.sweetener
  1. Beat the egg yolks with refined sugar and grated nutmeg.
  2. Rub loaf sugar on lemon rind to extract its juice, then put that sugar with cinnamon and the barley wine or strong ale into a saucepan and bring to a boil.
  3. Remove from the fire, add the gin if using, pour gradually into the yolks while stirring constantly, and sweeten further if needed.

See also: Tom and Jerry, Hot Egg Nogg

Source permits omitting the gin.