I love fishing caddis flies and I’m big on the history of patterns as well. Oliver Edwards presents a wonderful account of the progression of this pattern and presents a killer caddis dry fly. The fly also employs the split thread dubbed body using the Marc Petitjean Magic Tool. Be sure to use a thread that you can split easily like UTC. Uni can be split, but is a bit more difficult. The end result is a bit of a fluffy looking caddis, but I can see how the silhouette will be quite effective on the trout streams.