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.