With the author’s printed compliments slip loosely inserted. A collection of twelve essays, all previously published separately in journals between 1945 and 1953, on freedom, phenomenalism, basic propositions, utilitarianism, other minds, the past, and ontology. A number of the essays - namely ‘Individuals’, ‘On What There Is’, ‘The Identity of Indiscernibles’, and ‘Negation’ - variously respond to the philosophy of Willard Van Orman Quine, with particular reference to Quine’s generalised version of Russell’s theory of descriptions.