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- The aim of my work: The study of nature, the love of nature's art,and the need to express what one feels in one's heart.
- Ecrits pour l'art, ed. Henrietta Galle Paris 1908/Marseille (1980).
- Our roots are in the depths of the woods-on the banks of streams and among the mosses.
- Motto on Galle's studio doors (Musée de l'École de Nancy).