PREFACE. 



In composing this volume I hâve striven to connect the ethnographical and anthropo- 

 logical results obtained by the Expédition, with what has already been written by others 

 about New Guinea. 



To those who hâve rendered me assistance in this work I beg to tender my sincerest 

 thanks. In the first place to Dr. J. D. E. SCHMELTZ Director of the "Rijks Ethnographisch 

 Muséum" at Leiden; also to Mr. J. J. JESWIET, Curator of the "Koloniaal Muséum" at Haarlem, 

 who defined the botanical products, and to Dr. P. N. VAN Kampen formerly Assistant at 

 the Zoological Muséum of the University of Amsterdam, for his informations respecting zoology. 



Mr. T. A. JOYCE, Honorary Secretary of the Anthropological Institute, was kind enough 

 to look over the anthropological chapter. 



The defects which will undoubtedly be found in this work, resuit from the fact, that 

 in ethnographical and anthropological matters I am merely an amateur ; moreover the Expé- 

 dition remained as a rule only a short time at the différent places visited. 



On board H. M. S. "Admiraal van Wassenaer". 



Amsterdam, April 1907. G. A. J. VAN DER SANDE. 



