Stumbled across an article written by Mark Libertone a few years back. Man! I really liked Mark's tying style. A bit of roughness to his style that I like.
In the article he describes Leisenrings version of Black Gnat. Could anyone help me with "...herls taken from the dark, black-brown V-shaped section on the top of a turkey tail." Where on the tail are these taken and how does this feather look like?
Mark also wrote: "This is one of, in my opinion, Leisenring's most effective flies. I always carry some with me, and before leaving the water, always give it a shot. It's paid off many times." Thats why I would like to do an exact replica of the fly to have in my box when I come to Pennsylvania in May

Cheers
Martin
From http://globalflyfisher.com/patterns-tie ... gless-wets written by Mark Libertone in 2006:
The Black Gnat
Hook: standard wet-fly 12-18
Thread: Red or Claret
Hackle: Iridescent Starling
Body: two or three herls taken from the dark, black-brown V-shaped section on the top of a turkey tail.
Rib: (optional) Fine green wire.
Note: Leisenring's original pattern did not include the ribbing. I added this myself to strengthen the body.