XX. 



Camp the ascent is a fairly uniform grade, not particularly steep and 

 the mountain is apparently composed of shales and schists. From 

 the 6th Camp, however, a very steep ascent of about 1,400 ft. 

 brings one to the crest of a razor-backed ridge of sandstone and 

 quartzite leading to the base of the central mountain. On either side 

 of this ridge, which in places is not more than five or six feet wide, 

 there is a precipitous fall on the west to the Teku and on the east to 

 the Tahan valley, a magnificent view of almost the whole course of the 

 former river and the mountains on its opposite bank being visible 

 under favourable conditions. After several undulations, this ridge, 

 trending in a northerly direction, leads to the base of the cliffs of the 

 central mountain, after which a climb of about 600 ft. from ledge to 

 ledge brings one to the main arrcte, from which there is a descent of 

 about 800 ft. into the Teku valley. Below this point the valley is 

 suddenly broken off, so that in a horizontal distance, which cannot 

 much exceed a quarter of a mile, the river descends about 2,000 ft. in 

 a series of magnificent waterfalls. 



The upper valley of the Teku, which is thus cut off from the lower 

 valley, merits a more detailed description. To the west it is bounded 

 by the range of mountains which separate the Tahan Eiver system from 

 the Kechau, and which appear to attain a maximum elevation of about 

 6,000 ft. The eastern side is formed by the northern face of the 

 mountain depicted in plate C, and which is universally considered to be 

 Griiuong Tahan by Pahang natives. The northern end is closed in by 

 the ultimate summit of the range separated by deep valleys from the 

 eastern and western ranges. This mountain is that known in Kelantan 

 as Grimoug Siam. The whole length of the valley is about five miles, 

 while from crest to crest it is about two miles wide with an average 

 elevation of about 5,200 ft. It is abundantly watered by streams 

 which have cut deep clefts through the hard sandstone. Vegetation, 

 except in the vicinity of these streams, is very scanty and principally 

 consists of coarse grass and sedges intermixed with small shrubs. 

 The most curious feature of the valleys is the occurrence along both 

 sides and at various levels of flat plateaux, varying in area from a few 

 square roods to thirty or forty acres. In immediate vicinity to one of 

 these our 8th Camp was situated, and plate A, which is reproduced 

 from a photograph taken on the edge of the plateau, gives a very 

 good idea of the general appearance. From what could be seen of the 

 hills above the lower Teku valley, similar but even larger plains exist 

 there, and if ever the Teku uplands are reasonably accessible by road, 

 they would afford for six months in the year an almost ideal health 

 station, though at present there seems no prospect of their ever being 

 accessible, except by the somewhat arduous route up the Tahan Eiver. 



At the foot of the conical peak to the right of plate A, the Teku 

 River again bifurcates, and it was here that we pitched our final camp. 

 One branch runs about north-east and was followed to its source on the 

 ridge between the Teku-Kechau range and the central massif of 



