My interpretation:
1.5 oz Gin Lane 1751 London Dry
1 oz Martini & Rossi Extra Dry
Fill mixing-glass with ice, stir, strain into cocktail glass, serve. — This cocktail, essentially a gin-heavy Dry Martini (see above), appears first in Straub 1913 as a 2:1 High & Dry to Dry Vermouth. JM 1916 reproduces this with the slight variation of proportions as seen here, rounding the 66:33 to 60:40 and thereby slightly upping the Vermouth component, but not significantly. The Savoy Cocktail Book features under the name “Duke” a cocktail almost entirely different, except that it also contains Dry Vermouth; neither is there any apparent relationship to the Duchess Cocktail (also above).
