Jack's Manual by J. A. Grohusko (1910, p.83)

0.8 portionNicholson's gin base
0.15 portionFrench vermouth modifier
0.05 portionItalian vermouth modifier
ice — broken iceother
  1. Shake the Nicholson's gin, French vermouth, and Italian vermouth with broken ice.
  2. Strain into a whiskey glass and serve.

Ice: Broken ice

See also: Pat's Cocktail, Randolph