Page 154 - Bob Holtzman "The Field Guide to Knots How to Identify, Tie, and Untie Over 80 Essential Knots for Outdoor Pursuits"
P. 154
6. The finished, faired knot.
Untying: Use your thumbs to pry apart the two adjacent crossing turns on
either side of the knot, then pull the working end through the crossing turn in
the standing part
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