Are not our lowing heifers sleeker than Night-swollen mushrooms?
Probably the first form of the story was only that they went joyfully, "lowing as they went."
But she knew the country too well; she knew the lowing of cattle, the milking, the ploughs.
The former were lowing, the latter neighing, in an unusual manner.
It is a kind of lowing, but shriller, and not near so loud ...