Drinks Long and Short by Nina Toye and A. H. Adair (1925, p.13)

3 glassAbsinthe — Absinthebase
3 glassgin base
sugar — Optional, a little if desired.sweetener
  1. Combine the gin and absinthe with ice.
  2. Add a little sugar if desired, but nothing else.
  3. Shake very thoroughly and serve.

Ice: Ice