The Nuttall Encyclopedia
Yeomen of the Guard
A body of old soldiers of soldierly presence, employed on ceremonial occasions in conjunction with the gentlemen-at-arms, as the bodyguard of the British sovereign; they were constituted in 1485, and number besides officers 100 men; the Beef-eaters, as they are called, are the wardens of the Tower, and are a different corps.
Wood, James, ed. Entry for 'Yeomen of the Guard'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/y/yeomen-of-the-guard.html. Frederick Warne & Co Ltd. London. 1900.