Jean Demmeni, 
1896-1897, Objects of worship, held by the Kayans on the Upper Mahakam. From left to right Tekok, Usu Bruwa, Bowo Nangan, Telu hina, Tawu Nangan, [Borneo expedition to Central-Borneo led by Dr. A.W. Nieuwenhuis], Photograph, 
Leiden University Library, 
LL/90583