Page 342 - Bob Holtzman "The Field Guide to Knots How to Identify.."
P. 342
4. Pass the working end through the crossing turns from front to back. Hold both ends of the bight together
in one hand while pulling on the standing part of the rope to tighten the upper Half Hitch. Then pull the
standing-part leg of the loop to tighten the lower Half Hitch.
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