I trace the scientfic trajectory and identity of Olga Boone (1903 1992), the first female scientist working in the Belgian Congo Museum's ethnography section. Uncovering Boone's relatively unknown and remarkably diverse research in ethnic geography, musicology and bibliography, and her fieldwork in Congo, serves as a point of entry into a less well-known period in and unofficial history of Belgian twentieth-century anthropology. It also provides a window into museums as gendered spaces, particularly aspects of (in)visibility and materiality in collections and archives.