This chapter and the next explore a tension between two different worlds in which Keynes moved – himself apparently equally at ease in either. One of these was Cambridge, where his idiosyncratic relationship with the Economics Faculty was by no means what we would expect of an academic economist today. Instead we find him relying upon networks of friendship, with some important links going back to his early days as a member of ‘the Apostles’ in Cambridge. The writing of his major economic works, The Treatise on Money (1930) and the General Theory (1936) was thus crucially influenced in a way that we would today regard as quite unprofessional.