EXPEDITION INTO INTERIOR OF SUMATRA. 45 
party were Mr. Maxxtnx, the pilot, and Mr. Hermans, the 
engineer, afterwards succeedeed by Mr. Snispewrnp. 
As for myself, I was at the head of the other party, 
assisted by the Civil Engineer, Mr. D. D. Vertu, who was en- 
trusted with the geographical, geological and meteorological 
investigations, as well as the preparation of negatives for 
photographs, and by Mr. Sou T. SNeLLEMAN, whose province 
was zoology in its higher branches. Hthnology and the study 
of languages fell to my share. 
In summing up the results of our researches in this 
marvellous country, I will first deal with geography, as this 
subject, at a Geographical Congress like the present, 
should be given the first place. 
It seems superfluous to explain the success which crowned 
the efforts of Messrs. VeTH, CoRNELISSEN and Santvoort; with 
the exception of quite a small portion, the courses of the 
Hari and its chief affluent, the Tembesi, were minutely sur- 
veyed. Itwas thus discovered that the Hari, on quitting the 
highlands of Padang, flows due North, whence it follows 
that the furthest point navigable for large boats, is much 
nearer to the coal mines of Ombilin than it appeared to be on 
former maps ; so much so that the Hari is of as much impor- 
tance, as a highway for the transport of minerals to the Hast 
Coast, asthe river Indragiri itself. In surveying the southern 
part of the Padang up-lands it was discovered that the rivers 
Mamoun and Pottar belong in no way to the Kouantan 
basin, but are affluents quite distinct from the Hari. But 
most notably in the survey of Lebong was the inaccuracy of 
former surveys made apparent. 
The mountains of the interior of Sumatra have been 
described with great exactness by Mr. Vertu in the 2nd part of 
our work, which also contains all the geological and meteoro- 
logical records. The large collection of photographs of the 
country and of the people taken by him, are assuredly not 
the least part of the labours which have helped to extend our 
imperfect knowledge of Sumatra and itsinhabitants. Again, 
amongst the things which we were enabled to bring back with 
us, | must mention an ethnographical collection* of more 
* This collection is placed in the Royal Ethnographical Museum at 
Leyden. 
