Just in case anybody is interested -
After seriously practicing this piece, I now know that this is definitely a kind of pedalling mark. However, it is almost unnecessary, because the way the music flows, you do have to clear the pedal on these places. It is pretty much instinctual.
Coccobill - thanks again for the link to that other place. It's funny, because the person asked the exact question that I did, and no one knew for sure what to make of this sign. They say to do like Alicia de Larrocha (which I am hoping to do after I listen to her CD) and the books that are mentioned contradict each other. But Granados, himself, also wrote a book about pedalling (which I'm not sure - but I doubt if I could ever find it). At least it is kind of nice to know that I am not alone in my perpetual uncertainty and confusion.

I got that program installed (thanks again, C.B.). It is really neat! Now I can listen to the piece I’m having trouble with, slow it way down, and hear all the notes that are supposed to be played. All my questions about accidentals, harmonies, and errors in the book are answered. I love technology! (when I can figure out how to use it )

Yes, sometimes I do the same thing with my digital piano. It's very useful - and shocking, from time to time. You think you've played something like an even semi-quaver accompaniment, but when you re-listen to it slowed down, it's some jazzy dotted rhythm, in the best case...

That's funny! I haven't listened to myself play at slower speeds, yet. I'm sure you are correct about it being enlightening. But right now, I am having so much fun with this Granados piece and listening to A. de Larrocha - it really is amazing. I did not like the piece when I first started it. I couldn't hear the melody and harmonies correctly. But now....it's been like solving a mystery. I can't believe how many errors are in my book, and I would not have figured them out if I wasn't able to listen to the piece at a very slow speed. And I wasn't aware of how deLarrocha uses some techniques that you can't really hear at normal fast speeds, but I can hear them now. I'm starting to like the piece (mostly - probably more when I can actually play it ). Can't wait to do this to some other pieces too.