 She carefully crated up the entire contents of his atelier at "Villa Pat".Since she would be staying with her widowed mother in Biarritz for a while, she shipped the crates to Paris for safekeeping in the temporary custody of two trusted nephews, the noted architects Édouard Niermans (1903–1984) and Jean Niermans (1897–1989), "Officier de la Légion d’Honneur" ().Their father, Édouard-Jean Niermans () (1859–1928), celebrated as the architect of the "Café Society" and "Chevalier de la Légion d’Honneur", married Dewis's sister, Louise Marie Héloïse DeWachter (1871–1963), in 1895.