Yeah, the most fish catching fly. in the history of the obsession,The Royal Coachman, sure looks like a lot of insects I've seen on the water!
As stated, so well, "Flies to catch fish, flies to catch fishermen".
Tying God; I hope, as you continue your search, you take 8T's advice to heart!?!
He's right, when it comes to this pattern.
Also, on that particular nymph, (if you're tying to fish it and actually expect results, that is), the shavings must also be from only;
"THE LEFT, REAR, FOOT-CENTER NAIL OF THE OPOSSUM"!!
Be sure to shave the nail, about an 1/8th" out, from where the nail forms on the foot,as this is the thickest part and far less likely to break when tying it in.
And, for God's sakes, DON'T FORGET to use saliva stained cheek fur, for dubbing the thorax! (it's easy to differ, from other cheek fur. It has that "chewed tobacco brown" color to it).
Saint Paul-"The Highly Confused"
You cannot do a kindness too soon, for you never know how soon it will be too late.
-- Ralph Waldo Emerson