Hackle

Definition and stakes

Portrait of Robert Barnwell Roosevelt Robert Barnwell Roosevelt,  Superior Fishing

“ Having cut off the tinsel, catch with the spring pliers the butt of the hackle and follow the edge of the tinsel; rolling the hackle on its back so that the fibres shall point down the shank. When you reach the shoulder pass several turns of the hackle close above one another, and bringing down the tying silk secure the butt. If one hackle is not sufficient, and it rarely is, introduce a new hackle close above the first, precisely as you did the other, only on its back, and wind a sufficient number of close coils and again fasten it. ”
Source: Gutenberg

John S. Farmer,  Slang and its analogues past and present…

“ Hackle, subs. (common) .—Pluck; spirit; bottom (q.v.) . To show hackle = to show fight. [Hackle = a long shining feather on a cock’s neck.] Fr., avoir du foie; n’avoir pas le flubart, or avoir du poil au ciel.
Hackslaver, verb. (old) .—To stammer; to splutter; to hesitate in speech.
Hackum (or Captain Hackum, or Hackster) , subs. (old) .—A bully; a bravo. For synonyms, see Furioso.
1657. Lady Alimony, 1, 3 (Dodsley, Old Plays, 4th ed., 1875, xiv., p. 282) . Vowing, like a desperate haxter that he has express command to seize upon all our properties.
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Source: Gutenberg

W. Blacker,  Blacker's Art of Fly Making, &c

“ A.-Having held the fly by the shank to form the body, I now turn it and hold it by the bend, the hackle and tinsel previously tied in, as in Plate II, on salmon hooks, I roll the tinsel up first and the hackle next in rotation with it; Plate V. will show the tinsel rolled over the floss silk body, and the hackle ready to roll on. ”
Source: Gutenberg

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