In these undertakings I received the valuable
assistance of their Excellencies, the governor-general and the commanding
general, as well as the higher officials of the Dutch Government, to all
of whom I wish to express my heartfelt thanks.
Through the courtesy of the well-known Topografische Inrichting, in
Batavia, a competent surveyor, whose work will later be published, was
attached to my expeditions. He did not accompany me on my first visit to
the Bulungan, nor on the second occasion, when I went to the lake of
Sembulo, where the country is well known. In the map included in this book
I have indicated the locations of the different tribes in Dutch Borneo,
based on information gathered from official and private sources and on my
own observations.
I usually had a taxidermist, first a trained Sarawak Dayak, later a
Javanese, to collect mammals and birds. Fishes and reptiles were also
preserved in alcohol.
Specimens of ethnological interest were collected from the different
tribes visited; the collection from the Penihings I believe is complete.
Measurements of 227 individuals were taken and as soon as practicable will
be worked out by Doctor K.S. Schreiner, professor at the University of
Christiania.
