The Nuttall Encyclopedia
A regiment of 10,000 foot soldiers who formed the bodyguard of the ancient Persian kings; the name given to the 40 members of the French Academy.
Wood, James, ed. Entry for 'Immortals'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/i/immortals.html. Frederick Warne & Co Ltd. London. 1900.