Introduction, Keynes's Own IS-LM Approach.- Prologue to Keynes's IS-LM, 1930 to 1932.- The Advent of Keynes's IS-LM, 1933.- "The Missing Link" Keynes's Own Lecture Notes, December 4, 1933, Impact and Implications.- Reconstructing Keynes's IS-LM Approach, 1931 to 1937.- Keynes's Equations and Early Post-General Theory IS-LM Models.- The Legacy of December 1933: Re-Interpreting Mr Keynes.