sentences:  Grim (or Fairy Grim) is the name of a shapeshifting fairy that sometimes took the form of a black dog in the 17th-century pamphlet "The Mad Pranks and Merry Jests of Robin Goodfellow".He was also referred to as the Black Dog of Newgate, but though he enjoyed frightening people he never did any serious harm.In the village of Northorpe in the West Lindsey district of Lincolnshire (not to be confused with Northorpe in the South Kesteven district) the churchyard was said to be haunted by a "Bargest".