The Quilled Eagle

George Kelson writes of the Quilled Eagle "I rarely use any other  "Eagle"  but this, though I sometimes dress it with a yellow instead of a grey hackle."  He lists himself as the inventor.

 The Quilled Eagle - dressed grey, as per George M. Kelson

 
Tag: Silver twist and quill dyed yellow.
Tail: A topping, and two strands of Peacock herl (sword feather) of Bustard and Ibis.
Butt: Black herl.
Body: Quill dyed yellow, leaving space for four turns of orange Seal's fur at the throat.
Ribs: Silver tinsel (oval).
Hackle: A grey Eagle hackle, from centre.
Throat: Gallina (spotted feather).
Wings: Two tippets (back to back) veiled with extending Jungle, a strip of Ibis and Bustard, and a topping.
Sides: Jungle (to centre of former pair).

The Quilled Eagle - dressed yellow, as per George M. Kelson

Tag: Silver twist and quill dyed yellow.
Tail: A topping, and two strands of Peacock herl (sword feather) of Bustard and Ibis.
Butt: Black herl.
Body: Quill dyed yellow, leaving space for four turns of orange Seal's fur at the throat.
Ribs: Silver tinsel (oval).
Hackle: A yellow dyed Eagle hackle, from centre.
Throat: Gallina (spotted feather).
Wings: Two tippets (back to back) veiled with extending Jungle, a strip of Ibis and Bustard, and a topping.
Sides: Jungle (to centre of former pair).

The same pattern is found in Hardy, but not in Hale, who lists only one "Eagle," the Grey Eagle of a Mr. Murdoch.  I have not found the Quilled Eagle mentioned in any other of the old Masters.