Thanks for double-checking, Stu. I still don't quite follow what you and Rainer mean. I think my fingers and ears are just used to the way I play this here. I'm going to leave it alone now.
I did like learning this piece; I felt that I needed something VERY different from all the Mompou (and other Spanish music) I've been working on, and Haydn fit the bill nicely! I thought at first that one had to be very careful about every little thing, like in Mozart. But I learned that you can take a bit more liberties with Haydn. I don't know why, though, since both composers are from the same time and were personal friends and all that. I guess I just don't know much about Haydn except for the few pieces I've played. I too was surprised to see that 'mezza voce' there. I also doubt that it is Haydn's own marking.
Yes, this music was fun to learn but I'm still not crazy about sonatas. I don't intend to play any more Haydn-- at least in the near future. I've moved on...back to some favorites: Granados, Albeniz (I know....more Spanish...I can't stop!
), and a new Samuel Barber piece. Also a couple Chopin and a little Grieg.