The cow then left, plunging into a lake near Cerrig-y-drudion, and leading her two children, long-horned oxen (which are themselves the subject of other legends), after her.
Owen also quoted an earlier author on the matter of another Buwch Frech.
This author translated it as a Dun Cow, and wrote that a bone said to belong to it was to be found in Gwydir near Llanrwst.
Owen observed that "we have in these places conflicting conditions, which I will not endeavour to reconcile".
The idea of fairy cows with abundant milk which came from and returned to lakes occurs across Wales: Robin Gwyndaf of the Museum of Welsh Life lists a number of other names for them in both English and Welsh.