The Ideal Bartender by Tom Bullock (1917, p.41) — Bullock 1917

4 dashesLemon juice (fresh) — Lemon Juiceacid
1 jiggerJamaica rum — Jamaica Rumbase
1 tablespoonfulsugar — Bar Sugarbase
plain soda — Plain Sodadilution
3 dashescuracao — Curacoamodifier
  1. Fill a large bar glass half full with shaved ice.
  2. Shake well, strain into a tall thin glass, fill up with plain soda, stir gently, and serve.

Ice: Shaved ice

This matters because Bullock preserves a long Jamaican-rum branch with curacao and soda that sits between sour and highball logic.

The final soda top-up is part of the structure, not an optional lengthening note.

See also: High Ball, Santiago Cocktail