Haney's Steward & Barkeeper's Manual by Jesse Haney & Co. (1869, p.16) — Haney 1869

2 wine glassIrish whiskey — Irish whiskybase
2 wine glasshot water dilution
1 slicelemon slice — lemongarnish
1.5 teaspoonsugar sweetener
  1. Build Irish whisky, sugar, lemon slice, and hot water in a glass.

Garnish: Lemon slice

Source recipe no. 22.