Dunnie

A Dunnie is a small Brownie-like being in the folklore of the Anglo-Scottish borders, specifically Northumberland, the most famous being that of the Hazlerigg Dunnie of Hazlerigg in the parish of Chatton, Northumberland. The Dunnie has been known to take the form of a horse in order to trick a rider into mounting him before disappearing and leaving them in the muddiest part of the road. He also is said to disguise as plough-horses only to vanish when the ploughman takes him into the stalls.
The Dunnie was also said to wander the crags and dales of the Cheviots singing:
The Dunnie is thus thought to be a ghost of a reiver who hoarded his loot in the fells and guards his ill-gotten gains to this day.
In full the song of the dunnie goes: