Daly's Bartenders' Encyclopedia by Tim Daly (1903, p.105)

0.5 glassice — fine icebase
0.67 wine glassIrish whiskey — Source reads two-thirds wine glass.base
2 dashesorange bitters bitter
1Olive garnish
1 dashBenedictine — benedictinemodifier
1 dashgum syrup sweetener
  1. Stir the fine ice, gum syrup, orange bitters, Benedictine, and Irish whiskey well.
  2. Strain into a cocktail glass, add an olive, and serve.

Garnish: Olive

Ice: Fine ice

See also: Whiskey Cocktail, Imperial Cocktail