Live Toad found by Mason in Stone (sources)
- Natural History of Staffordshire, by Robert Plot, 1686 Oxford, England. Pgs. 247-251. Online: https://books.google.com/books?id=JlFfAAAAcAAJ&printsec=frontcover&dq=inauthor:%22Robert+Plot%22&hl=en&sa=X&ved=0ahUKEwi-idjtpaDWAhXoyFQKHfYxApkQ6AEILjAB#v=onepage&q&f=false