Paul Brody, Kenneth Grahame (2015). “The Life and Works of Kenneth Grahame: A Biography and Collection of Grahame’s Work”, p.332, BookCaps Study Guides
Thaddeus Norris (1864). “The American Angler's Book: Embracing the Natural History of Sporting Fish, and the Art of Taking Them. With Instructions in Fly-fishing, Fly-making, and Rod-making; and Directions for Fish-breeding. To which is Appended, Dies Piscatoriæ: Describing Noted Fishing-places, and the Pleasure of Solitary Fly-fishing”, p.29