Time and again the turn was so quick that the stirrup swept the ground.

At last the cow, convinced of the uselessness of further effort to return, broke away on a long lumbering run to the open plain.

She was stopped and held by the men detailed, and so formed the nucleus of the new cut-herd.
Immediately Little G, his ears working in conscious virtue, jog-trotted back into the herd, ready for another.
After a dozen cows had been sent across to the cut-herd, the work simplified.

Once a cow caught sight of this new band, she generally made directly for it, head and tail up.

After the first short struggle to force her from the herd, all I had to do was to start her in the proper direction and keep her at it until her decision was fixed.