E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Kelpie or Kelpy.
A spirit of the waters in the form of a horse, in Scottish mythology. Not unlike the Irish Phooka. (See FAIRY.)
Every lake has its Kelpie or Water-horse, often seen by the shepherd sitting upon the brow of a rock, dashing along the surface of the deep, or browsing upon the pasture on its verge.Graham: Sketches of Perthshire.