During the winter of 1975-6, the Keynes family unexpectedly discovered another collection of Keynes's papers at Tilton, his Sussex house. In this was a substantial amount of material relating to the composition and defence of the General Theory, including many more early drafts. This volume brings together these papers, along with a few others that have come to light since the publication of Volumes 13 and 14 of this series in 1973. It is a necessary companion to these volumes and their chronicle of intellectual development and achievement.