All the information is out there, but from time to time it needs to be drawn together into something approaching a coherent and manageable form. In some cases, the material has been put up "as is" in forms which are quite difficult to find or to use effectively (I am a great believer in proper indexes and lists of contents), so some commentary can also be helpful, even if it is often critical.

Essentially it's just a finding aid, and only incomplete work-in-progress (there is a great deal more that might usefully be done): it's a good thing that Nina mentioned it, though, as I would probably not have got around to doing that myself, such things being (by their nature) never finished.