Julian's Recipes by Julian Anderson (1919, p.13)

1 piecelemon peel acid
1 lumpsugar — Dissolved in a little hot water.base
0.5 jiggerwhiskey, brandy, or gin base
boiling water — boiling hot waterdilution
nutmeg — Grate on top.other
  1. Dissolve the sugar in a little hot water, add the chosen spirit and lemon peel, and fill with boiling hot water.
  2. Stir, grate nutmeg on top, and serve.

Garnish: Nutmeg and lemon peel

Lineage reconciliation

See also: Hot Scotch, Cold Toddy

Source says either whiskey, brandy, or gin.