La grande Petitesse et ses filles" (playtime about 8-12 minutes) consists of 8 miniatures in F sharp minor (the "daughter" pieces, called "Petitesses"), that could also be played separately. Parts of "La grande Petitesse" are very challenging, so I would expect that even an advanced pianist may need some time to practice it. As with all my scores, there are no markings. So you have all pianistical freedom to create your own, individual interpretation.