This represents a goat being devoured by a beast, just as the Xiongnu horsemen would sweep down from Mongolia in the Northwest to pillage China's northern provinces.
The cavalry was taken care of, when Morgan fained a retreat by sending part of his army to one flank tricking the horsemen into pursuing them straight into the line of fire of his remaining forces.
Edward, sufficiently convinced by this time that the Scots meant fighting, fled to Dunbar, without drawing bridle, accompanied by no more than five hundred horsemen.