Abstract
Although William Lyons's study of Ryle is designed "primarily" as a "simple, clear and basically sympathetic introduction to his work... in a way that is digestible by a tyro in philosophy," more advanced students of the subject will find it useful largely for its extended effort to absorb and assess the body of criticism that has accumulated around The Concept of Mind, not least of all Ryle's own during the last twenty-five years of his life when he produced a long series of supplementary articles calculated to remedy "the perfunctoriness" with which, in his own words, he had dealt with "Mind qua pensive."