Page 235 - Geoffrey Budworth, Jason Dalton "The Little Book of Incredibly Useful Knots"

Riffle (riffling) hitch

Also called the Portland Creek hitch or the Newfoundland hitch, this knot may be used by fly-

fishermen to impart a realistic liveliness to the fly by skimming it across the surface of the water
at a 45° angle from the leader. When a fish strikes heavily, the knot may slip off, but—having
been tied in the bight—it will fall apart and not remain to weaken the line.

Having attached the fishing line to the eye or ring, pass a loop over the fly’s head (1). Add a second

loop if desired (2), then pull on the end to tighten the hitch (3).