The Nuttall Encyclopedia
A jester at the court of Denmark, whose skull Hamlet apostrophises in the churchyard; also a sinister jester in "Tristram Shandy."
Wood, James, ed. Entry for 'Yorick'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/y/yorick.html. Frederick Warne & Co Ltd. London. 1900.