Andrey wrote: What makes you think these aren't my work?
I apologize. Both of us don't speak English as first language.
Your sentence "But this is not all my work" can be interpreted in different ways:
1) In the gallery is not just my work but work of other people as well.
2) I have more painted figures than I showed in gallery.
One small "of" could solve all misunderstanding (this is not all OF my work)
Please, I'm not trying to teach you English.
I'm sorry for this misunderstanding. Enjoy your stay here and keep them coming