First, lay a loop of twine alongside the rope, with the open end of the loop toward the end of the rope.
Then, beginning a short distance from the rope end, wind the twine tightly around both the rope and the twine loop. the last turn of the winding is inserted through the loop end.
Next, holding the rope in one hand, pull the twine-end at the end of the rope until the twine-end is about mid-way in the whipping. Clip both twine-ends and the job is complete. The whipping should be at least as long as the diameter of the rope.