This week we continue a look at Northern English fairy lore with the water hag, known as Peg Powler, Jenny Greenteeth, and sometimes as Nelly Longarms. These are a type of being known as a Grindylow, and they are said to pull children and sometimes the elderly into the watery depths of bogs and rivers. We may think of them as a fearsome being invented to keep children from drowning, but is this really the case?