I think the graphite on top of the watercolour helps give the squash a 3 D effect. I like both images.
The squash is a fantastic study and looks really 3D. I quite often get annoyed with the limitations of watercolour pencils, but I think you show I need to preserve.
The moonlight image is really striking. Quink is so staining I'm surprised you lifted so much out! Did you lift the moon out or leave that unpainted?
I love that little ship disappearing into the distance.
Moonlight was done solely with quink and washing out with wet paintbrush. It is much darker than the photo shows.
Squash - watercolour pencil & graphite pencil