E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Aconite.
The herb Monkshood or Wolfsbane. Classic fabulists ascribe its poisonous qualities to the foam which dropped from the mouths of the three-headed Cerbrus, when Hercules, at the command of Eurystheus, dragged the monster from the infernal regions. (Greek, óo, Latin, acontum.)
rus, when Hercules, at the command of Eurystheus, dragged the monster from the infernal regions. (Greek, 
ó
o
tum.)
