Harry of Ciro's ABC of Mixing Cocktails by Harry of Ciro's (1923, p.69) — Harry of Ciro's 1923
| 1 teaspoonful | lime juice — Lime Juice (Rose's) | acid |
| 1 dash | Angostura bitters — Angostura Bitters | base |
| 0.75 glass | gin | base |
| 1 dash | orange bitters — Orange Bitters | bitter |
| 0.5 glass | Orange curacao — Curacao (Orange) | modifier |
- Shake well and strain into cocktail glass.
This matters because it gives us a clear London 1923 Pegu Club checkpoint in the interwar gin-citrus field.
The Rose's lime and paired bitters are the key source-specific details here.