Volume 2 which is the first of the series to be issued includes ALL sides on which Fats Waller appears from the March 1, 1929 session to the November 7, 1934 one.
As mentioned before, volume 1 which should have the sessions up to early 1929 should be out next.
If it (and the next volumes) is as thorough and enjoyable as volume 2, I plan to get them all.
And discard the French RCA issues which were a bit of a mess!
The sides Fats Waller recorded in Britain were not included in the French vinyl collection because they had not been recorded for RCA.
The JSP vol. 2 includes everything (RCA, Okeh, etc... sides).