Izaak Walton (1653). “The Compleat Angler: Or, the Contemplative Man's Recreation, Being a Discourse of Fish and Fishing Not Unworthy the Perusal of Most Anglers”, p.246
Izaak Walton, Charles Cotton, Sir John Hawkins (1808). “The complete angler; or, Contemplative man's recreation:: being a discourse on rivers, fish-ponds, fish, and fishing. In two parts:”, p.102
Izaak Walton, Charles Cotton (1824). “The Complete Angler of Izaak Walton and Charles Cotton: Estensively Embellished with Engravings on Copper and Wood, from Original Paintings and Drawings, by First-rate Artists, to which are Added, an Introductory Essay, the Linnœan Arangement of the Various River Fish Delineated in the Work, and Illustrative Notes”, p.57
Ray Bergman (1938). “Trout: Fly Plates in Full Color Painted by Edgar Burke; Photographs of Fly Tying by Charles S. Krug; Also Many Diagrams in Line by Ivin Sickles”