"I believe that in our country Bilders' art is entirely self-contained and has not generated a particular school, despite the educational and moral strength which his art expressed. But man is inclined to compare, and that's why I believe Théodore Rousseau may be called Bilders' elder brother. Bilders' 'Wodans oaks' paintings.. ..[are] as beautiful as many by Rousseau. (translation from Dutch, Fons Heijnsbroek)"