"Mrs. Darling loved to have everything just so, and Mr. Darling had a passion for being exactly like his neighbours; so, of course, they had a nurse. As they were poor, owing to the amount of milk the children drank, this nurse was a prim Newfoundland dog, called Nana, who had belonged to no one in particular until the Darlings engaged her."
from Peter Pan by J.M. Barrie