1.
Fresh tracks in the Belgian Congo from the Uganda border to the mouth of the Congo
2.
3.
A review of the ethnological investigations in the Dutch Indian archipelago
Recherches sur l'ethnologie de la Belgique
Onze kolonie : practische studie over Belgisch Congoland /
Inleiding tot de volkenkunde van Nederlandsch-Indië.
De Volken van Nederlandsch Indië, in monographieën /
Nederlandsch Oost-Indië beschreven en afgebeeld voor het Nederlandsche volk.
The Asiatic islands and New Holland : being a description of the manners, customs, character, and state of society of the various tribes by which they are inhabited /
Pygmies & Papuans; the stone age to-day in Dutch New Guinea
Carved head of wood, Belgian Congo. Religious mask