Jack Black was a rat-catcher and mole destroyer from Battersea, England during the middle of the 19th century.[1][2] At the time, England was ravaged by a massive population of rats that disrupted crops and spread disease, and Black's rat killing abilities made him a minor celebrity and Queen Victoria's official rat-catcher. Though he has been called the rat's "most notorious enemy," he did not kill all rats.[3][2] Black bred unusually colored rats and sold them as pets, playing a large role in domesticating the animal. He had a flamboyant appearance, typically donning a self-made "uniform" of a green topcoat, scarlet waistcoat, and breeches, with a huge leather sash inset with cast-iron rats.
Mayhew
was invoked but never defined (see the help page).