| Jean Demmeni Sawang Ulo, a young Kayan of the Upper Mahakam, Central Borneo. On his right arm scars of burns caused by burning pieces of resin on the skin to prove his endurance of pain [Borneo expedition to Central-Borneo led by Dr. A.W. Nieuwenhuis] 1898-1900 Photograph 17 x 12 cm Leiden University Library Royal Netherlands Institute of Southeast Asian and Caribbean Studies (KITLV), Accession number: 25682 LL/90577
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