Rat King of the Emblemata (sources)
- Emblemata et aliqvot nvmmi antiqvi operis [Emblems with some ancient coins], by Joannes Sambucus, fourth edition, 1576. Pgs. 247-248. Online [Latin]: https://books.google.com/books?id=zTwUAAAAQAAJ&printsec=frontcover&dq=Sambucus+Emblemata+1576&hl=en&sa=X&ved=0ahUKEwjj8fG47J3dAhVJ6Z8KHdlQCMcQ6AEIJzAA#v=onepage&q=Sambucus%20Emblemata%201576&f=false
- "Sambucus, Joannes: Emblemata (1564)," by Arnoud Visser, page in the French Emblems at Glasgow website, viewed 9-18-2018. Online: https://www.emblems.arts.gla.ac.uk/french/books.php?id=FSAb
- "Emblem Book," page in the Wikipedia website, viewed 9-18-2018. Online: https://en.wikipedia.org/wiki/Emblem_book