Stanley Cocktail is a simple split-base gin-and-rum sour with grenadine and lemon.
Harry of Ciro's ABC of Mixing Cocktails by Harry of Ciro's (1923, p.78) — Harry of Ciro's 1923
| 0.5 glass | lemon juice — Lemon Juice | acid |
| 0.5 glass | gin | base |
| 0.5 glass | Grenadine | base |
| 0.5 glass | rum | base |
This matters because it preserves another compact split-base red-fruit sour in the late London seam.
L'Art du Shaker by Dominique Migliorero (1925, p.65)
| 0.33 part | orange juice — Orange juice | acid |
| 0.33 part | gin — Gin | base |
| 0.33 part | white rum — White rum | base |
Barflies and Cocktails by Harry McElhone and Wynn (1927, p.76) — Barflies 1927
| 0.17 part | lemon juice — Lemon Juice | acid |
| 0.33 part | gin | base |
| 0.17 part | Grenadine | base |
| 0.33 part | rum | base |
This matters because it preserves a direct dual-spirit sour in McElhone's late 1920s field without later simplification.
See also: Royal Smile, Side-Car Cocktail