' Speaking out of Turn : Martin Heidegger and die Kehre ' examines the difference between Heidegger's own understanding of 'the turning' and that understanding which originated with Karl Lowith and was later presented to English-speaking readers by William Richardson in Martin Heidegger: Through Phenomenology to Thought . The study focuses on Heidegger's own introduction to Richardson's book, and argues that, far from confirming Richardson's view that there is a 'Heidegger I' and 'Heidegger II' connected by the 'reversal' or turning, Heidegger sought to indicate with (sometimes indirect) reference to his own works that the 'turning' is a movement in thought that it was part of the original project of Being and Time to carry through, but which he only succeeded in describing much later. The study attempts to illustrate this by a close examination of the works to which Heidegger alludes in his Foreword to Richardson's book. Many of these were not available when Richardson published (1963), and so it has only more recently been possible to amplify Heidegger's earlier published works with reference to his lecture courses. The study concludes that the horizon of time and the analytic of Dasein never really disappear from his later thinking, as many have claimed, and proposes that the relationship between the earlier and later Heidegger be re-examined. This re-examination takes the form of accepting that far from the 'turning' representing a fracture, where Heidegger abandons the existential-temporal analytic of Dasein in favour of an attempt to think only being ( das Sein ) as such, the 'turning' represents the point of unity in Heidegger's work. This point of unity shows how Dasein and being 'belong together' in 'the event' ( das Ereignis ).