Ellery Clark Gregg, How to Tie Flies
“ A Bi-visible is shown in Fig. 6. This is a fly without wings, hackle tied palmer (that is hackle wound the full length of the hook, usually tied without a body, and the dark patterns have a turn or two of white hackle in front) .All of the flies on Diagram 2 are shown as dry flies; however, the same feathers are used for wet flies, streamers, etc., the difference being the style in which they are tied, which is explained elsewhere. WAX: Use a good grade of wax for fly-tying. The proper wax will work much better than shoemaker's wax or beeswax. ”
