Page 503 - Bob Holtzman "The Field Guide to Knots How to Identify, Tie, and Untie Over 80 Essential Knots for Outdoor Pursuits"

3. Pass the working end through the round turn a second time. The knot must be worked gradually into
shape, pulling slack through the round turn and hitches and into the working end and standing parts a bit at
a time until the round turn is tight around the ring.

Untying: Pull the working end through the round turn. If necessary, first

loosen the round turn by pulling slack from the standing part through the
doubled Half Hitch.

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