... wards be negligent and reckless, and it profiteth not that some unwise men do, that close within the vineyard hounds, that are adversaries to foxes. For few hounds, so closed, waste and destroy more grapes than many foxes should destroy that come and eat thereof thievishly. Therefore wise wardens of vineyards be full busy to keep, that no swine nor tame hounds nor foxes come in to the vineyard. From fretting and gnawing of flies and of other worms, a vineyard may not be kept ... — Mediaeval Lore from Bartholomew Anglicus • Robert Steele