  It is said that, when Wittgenstein returned to Cambridge in January 1929, it was primarily to discuss philosophy with Ramsey, who he obviously deemed a worthy interlocutor, and they reportedly met on a regular basis, until Ramsey’s death the following January. They both left behind manuscripts which show that Ramsey had shifted his views on a number of topics, while Wittgenstein’s thought was also set in motion towards his later views. In the preface to the Philosophical Investigations, he wrote: