Search:

So, I tied one up...

The bug bond will keep the hackle collar split underneath but will not keep it flat. The natural curve of the feathers wrapped around the hook will still cause the hackle on...

I can't say from personal experience, but Datus Proper wrote in What the Trout Said, that upside down dries were poor hookers.
The earliest reference that I've come across to splitting the underside...

Every time I try to do the tail like Davie, the fibers go flying. I cannot figure it out.

I'd lay odds this was Bill Heckel.

The swept up hackle is not dissimilar from the effect created by Datus Proper with his Perfect Dun or by Bill Heckel in his Biot Dun.
As for the mix of hackles/colors, check out the writings of...