...or, in my case, a musician. I'm so used to noticing things like arch forms in Mozart sonatas and suchlike that it's almost disappointing not to find one in a JA novel!

The volumes, to the best of my knowledge, were released together. As I think I've mentioned before, the rationale for this was that, books being expensive items back then, a publication in three volumes would allow one member of a household to pass V.1 on to another member while continuing with V.2. Thus three people could be reading the same book at the same time.