Last update. I Returned to the same pond last night. The gills were not biting anything subsurface I threw at them. Not the leech pattern or anything else. I went through about 8 different flies. Finally I tied on a leech made with black and white sparkle yarn. ( Has a salt and pepper look but mostly pepper. The white makes is easy to see. ) To make a long very exciting story short, I caught a 10 inch bass on it and then a 20 inch largemouth on it. ( On my 4 wt. which was very exciting for me. ) It is still a killer pattern just not for gills last night.