It looks as though we have

1. English. A prelude: Schmoller's (quasi anonymous) review of Menger's 1871 _Principles_ (Caldwell 2004, appendix A). 
2. English. The explicit origins: Menger's (1883) _Investigations_ (mises.org)
3. German. reviews by Schmoller, Roscher, Wagner, Dietzel etc
4. German. Menger's rejoinder (in his _Collected Works_, mises.org) 
5. English. THE HISTORICAL vs. THE DEDUCTIVE METHOD IN POLITICAL ECONOMY. E. v. BÖHM-BAWERK. Translated by HENRIETTA LEONARD Annals of the American Academy volume 1, (1890-91) http://www.efm.bris.ac.uk/het/bawerk/bohm001.htm
6. German. A variety of follow-ups.

I plan to organise a group of scholars to provide commentaries on the translations of 3 and 4 (plus, perhaps, parts of 6) for Volume 9.

RL

Archival Insights into the Evolution of Economics

Vol 1: The Keynesian Tradition (2008) Palgrave Macmillan http://us.macmillan.com/thekeynesiantradition

Vol 2: The Anti-Keynesian Tradition (2008) Palgrave Macmillan http://us.macmillan.com/theantikeynesiantradition

Vol 3: American Power and Policy (2009) Palgrave Macmillan http://us.macmillan.com/americanpowerandpolicy

Vol 4: Hayek and Behavioural Economics (2013) Palgrave Macmillan. Foreword by Vernon Smith (co-editor: Roger Franz)

Vol 5: Hayek: a Collaborative Biography Part 1 Influences, From Mises to Bartley (2013; in press) Palgrave Macmillan 

Vol 6: Hayek: a Collaborative Biography Part 2 Before Chicago (2014; in production) Palgrave Macmillan

Vol 7: Hayek: a Collaborative Biography Part 3 Redirecting World History (2014) Palgrave Macmillan

Vol 8: Propriety and Property: New Studies on the Philosophy of Adam Smith (2014) (editor: Leslie Marsh)

Vol 9: Hayek and the Austrian School (2014) Palgrave Macmillan

Vol 10: Pigou (2014) Palgrave Macmillan