In Plato's 'Theaetetus', Socrates is portrayed as a midwife to the intellect, a metaphor for his task as a dialectician as he seeks to help give birth to wisdom. Thus it is that the author refers to Plato as the midwife's apprentice. This volume offers an account of I.M. Crombie's magnum opus, 'An Examination of Plato's Doctrines'.