The Nuttall Encyclopedia
A high officer of State, an office of very ancient institution, now the head of the college of arms, and hereditary in the family of the Dukes of Norfolk; formerly one of the chief officers in the court of chivalry, a court which had to do with all matters of high ceremonial, such as coronations.
Wood, James, ed. Entry for 'Earl Marshal'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/e/earl-marshal.html. Frederick Warne & Co Ltd. London. 1900.