6 A JOURNEY TO THE SOURCE OF THE INDAU. 



few days. The hills now rapidly closed in on every side and 

 the course of the stream lay in a narrow rocky ravine. At a 

 point about 30 miles above Mount Janing, an old jungle path 

 leads in a Westerly direction across the hills to the plain of 

 Tenang, in the Segamat district, one long day's march for 

 men without loads. Two days' journey towards the South- 

 West brought us to the base of Gunong Besar and Gunong 

 Chabang-tiga. At this point there is an extremely picturesque 

 little waterfall, the stream falling over a mass of granite rocks 

 nearly 40 feet high; here also are two huge boulders of granite 

 which may serve future travellers as a landmark. Above the 

 waterfall the Indau becomes a mere mountain rivulet with 

 numerous tiny tributaries. The actual source is on the Eastern 

 slope of a lofty ridge (1,800 feet above sea level) which con- 

 nects Gunong Besar on the North with Gunong Chabang-tiga 

 on the South. The formation here is a stiff yellow clay over- 

 lying the granitic country rock. On the Western slope of the 

 ridge, or saddle back, is the source of the Segamat, which even- 

 tually empties itself into the Muar River. I spent several 

 days in mapping this hill country, which does not appear to . 

 have been previously explored. 



Gunong Besar is composed of a fine-grained grey granite 

 traversed here and there by eruptive dykes and overlaid on 

 the lower slopes with clays and clay shales. Height determin- 

 ed by aneroid 2,600 feet above sea level. 



South of Gunong Besar and connected by the forementioned 

 ridge is Chabang-tiga with its three granite peaks, the highest 

 of which I estimate to be over 3,000 feet above sea level. To 

 the North, East and South-East a small series of mountains 

 stretch away to the horizon in one confused mass of jungle- 

 covered peaks, ridges and chains. To the South-West lies the 

 plain of Tenang, watered by the rivers Juassih, Tenang and 

 Segamat, all tributaries of the Muar. 



The range in which Gunong Besar and Gunong Chabang- 

 tiga constitute the chief features, runs approximately North and 

 South and is apparently separated from the hills to the far 

 North and North-East by a fiat tract of jungle country. 



For topographical purposes, I have called this small system 



