Found this on Hans Weilenmann's site. Tied the wing a bit fuller than the original to improve visibility (for me).
hook ? Dai Riki 320 #14
thread - Danville 6/0 brown
abdomen - Zelon dubbing hydropsyche
thorax - dubbing hot orange
hackle - dun CdC/partridge
wing - Congo Hair white
Part 1
mash barb, start thread at 2/3 mark; wrap to bend
dub abdomen to 2/3 mark
dub thorax to 80% mark
tie in a hank of CH (as thick or thin as you desire; my sight's not as good as Mr. Ruoff's) over the eye
create thread loop
insert CdC in clip (my stock is low-grade so I used 2 feathers), trim butts, insert in loop, spin