It is forty years since Professor Newark wrote despairingly of nuisance that “the subject as commonly taught comprises a mass of material which proves so intractable to definition and analysis that it immediately betrays its mongrel origins.” The “truest dictum in the books” was that of Erle C.J., who had once said in answer to the question, what is a nuisance?, that it was “immersed in undefined uncertainty.” Little has changed since 1949. Public and private nuisance still face life together in the textbooks, the universities and the law reports, despite the convincing evidence all round, much of it gathered in Newark's article, that they have little in common except the accident of sharing the same name. Making hoax bomb calls, obstructin...