

"Ju-Ju" men, looked upon with great respect for their witchcraft
Another similar & clearer photograph of the same 4 maskers and other costumed person appears in the photo collection of the Museum fur Volkerkunde, Wien, inv. no. VF 17358 with the heading "Maskentanzer in Bamum, Rudolf Oldenburg / um 1904." It may be found on the museum website at http://www.ethno-museum.ac.at/en/collections/photo-collection/objects. The same photo appears in Chistraud M. Geary's 1988 book referenced in the previous comment.