The Modern Bartenders' Guide by O. H. Byron (1884, p.9)

1Absinthe — Source says one pony absinthe.base
0.25ice — fine icebase
2water — Source says two wine-glasses of water.dilution
dashgum syrup — Source says four or five dashes.sweetener
  1. Shake the ingredients until the outside of the shaker is covered with ice.
  2. Strain into a large bar glass.

Ice: Fine ice