The Nuttall Encyclopedia
The winged rod of Hermes, entwined with two serpents; originally a simple olive branch; was in the hands of the god possessed of magical virtues; it was the symbol of peace.
Wood, James, ed. Entry for 'Caduceus'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/c/caduceus.html. Frederick Warne & Co Ltd. London. 1900.