The Kelpie's Pearls

"An old woman of the Scottish highlands makes friends with a kelpie, sees the Loch Ness monster, and practices some of her grandmother's witchcraft." --summary, WorldCat library records of multiple eds. "Morag MacLeod lived near Loch Ness in the Scottish Highlands, and this is the story of how she came to be called a witch. Small wonder, too, what with her carrying on with a kelpie--the creature who lives in the bottom of a pool. and roams about in the shape of a big black horse." --Kirkus Reviews (contemporary, undated online, above)