Madame de Polès' death can be found in a draft provenance in the NGA curatorial files. She appears to have been liquidating her collection in 1927; in addition to selling Woman Sewing to Wildenstein's, a large group of her objects was sold at the Galerie Georges Petit on 24 June 1927.
Bibliography
1927
sale (Catalogue des objets d'art et de magnifique ameublement du XVIIIe siècle...composant la très important collection de Madame de Polès, Galerie Georges Petit, Paris, 24 June 1927)