Harry of Ciro's ABC of Mixing Cocktails by Harry of Ciro's (1923, p.74) — Harry of Ciro's 1923
| 1 glass | sloe gin — Sloe Gin | base |
| 1 teaspoonful | sugar | base |
| ginger ale — Ginger Ale | dilution | |
| 1 egg | whole egg — Fresh Egg | other |
- Shake well and strain into a medium-sized tumbler.
- Fill the balance with ginger ale.
This matters because it preserves a sloe-gin whole-egg fizz branch outside the standard gin fizz line.
The use of ginger ale rather than soda is the key structural detail here.