Harry of Ciro's ABC of Mixing Cocktails by Harry of Ciro's (1923, p.70) — Guido, Cafe de Paris, Monte Carlo

0.5 glassgin base
0.5 glassItalian vermouth — Italian Vermouthbase
1 dashorange bitters — Orange Bittersbitter
0.5 glassFrench vermouth — French Vermouthmodifier
1 teaspoonfulwhite creme de menthe — White Mintmodifier
  1. Shake well and strain.

This matters because it preserves a named Monte Carlo mixed-vermouth aperitif branch in the London 1923 field.

The white-mint modifier is the main point separating it from plainer mixed-vermouth gin drinks.

Barflies and Cocktails by Harry McElhone and Wynn (1927, p.60) — Guido, Cafe de Paris, Monte Carlo

0.33 partgin base
1 teaspoonfulwhite creme de menthe — White Mintbase
1 dashorange bitters — Orange Bittersbitter
0.33 partFrench vermouth — French Vermouthmodifier
0.33 partItalian vermouth — Italian Vermouthmodifier
  1. Shake well and strain.

This matters because it preserves a Monte Carlo hotel-bar mint-vermouth aromatic in the late 1920s canon.

See also: Martini Cocktail, Perfect Cocktail