Cocktails Bar La Florida by Constante Ribalaigua Vert (1934, p.118)

2 ouncesAbsinthe — Pernot absinthebase
0.25 glassanisette base
water — natural waterdilution
  1. Build with cracked ice in the strainer and fill with water.

Café Royal Cocktail Book by W. J. Tarling (1937, p.30)

1 liqueur glassAbsinthe base
water — cold waterdilution
1 lumpsugar — Dissolve using the French drip spoon.sweetener
  1. Place the absinthe in a liqueur glass.
  2. Dissolve the sugar with the French drip spoon and fill the glass with cold water.

This is a service ritual rather than a shaken mixed drink.

See also: Absinthe

Use the French drip spoon.