Page 611 - Bob Holtzman "The Field Guide to Knots How to Identify, Tie, and Untie Over 80 Essential Knots for Outdoor Pursuits"
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7. The finished Sheepshank.
Sheepshank refinements: If the Sheepshank is being used to bypass a weak
section of rope, the weak section should be at the top of the middle crossing
turn in Step 1. When the knot is tightened, the weak section will run directly
between the tightened crossing turns to the right and left and will not be a
part of either of them. The size of the crossing turns can be varied to take up
more length of rope (make the middle crossing turn larger) or to make a pair
of larger loops (make the right and left crossing turns larger).
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