This isn't a pattern of my own invention. Many years ago Alan Roe arrived home from work late. On looking in the refrigerator for something to eat he saw a box containing 4 packs of Birds Eye Cod in Parsley Sauce. Grabbing it he put two in the microwave for dinner. Between the packs he found a sheet of thin foam packing material. After his dinner he sat for a couple of hours thinking that there must be a fly tying application for this foam sheet. This pattern is what he came up with. A few years later he taught me fly tying; one of the patterns he showed me was this one.