Page 458 - Bob Holtzman "The Field Guide to Knots How to Identify, Tie, and Untie Over 80 Essential Knots for Outdoor Pursuits"

5. Holding the first working end in place, make an identical set of crossing and round turns with the second
working end around the standing part of the first rope. This requires some dexterity or a superabundance of
fingers.

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