186 JOURNAL, NATURAL HIST. SOCIETY OF SIAM. Vol. I. 
sluggish than the common squirrel, and which has the habit of lying 
spread flat on big horizontal branches for some time when observed, 
with perhaps the end of the tail appearing over the side only. 
From here J followed down the Pran valley to the next Karang 
hamlet, and ascending a range of 600 metres to the South Hast, crossed 
over into the Huey Sat Yai, a stream considerably bigger than the 
parent Pran river. 
On the march we found old evidences of rhinoceros, and the cook 
collected all the dried excrement he could find, the Chinese having great 
faith in anything connected with the rhinoceros as medicine. 
The game track up the Sat Yai is excellent going in the dry 
season, and the track must have been used without change for 
generations by pachyderms, judging by the gnarled tree roots and rocks 
* polished and worn smooth occurring in the path. On the 2nd day’s 
journey up this stream, at about nine o’clock, we found ourselves on the 
brink of a dry gully, which extended in an almost straight line far up 
the hill side, and showed up clearly against the deep green jungle on 
either side. A pair of Malay bears were observed feeding and _ leisurely 
turning over stones up the gully some 200 yards away. These I stalked 
and missed, but I came back at 6 p.m. when another bear appeared in 
the same spot, and this I also missed, misjudging the distance in the 
failing light. The Malay bear was frequently observed in that valley 
and took little heed of the coolies going to and fro for rice and supplies. 
Two days later, continuing the march upstream, the fresh tracks 
of rhinoceros were found. I have not yet seen one, but from the fact of 
native hunters recognizing the “raadt” or one-horned species and the 
“-ra-soo” with two horns, it is almost certain that both R. sondaicus 
and R. swmatrensis exist in that area, I have found their tracks up to 
and above 4000 feet. In 1911, a female with young attacked a Survey 
party in the Yang Choom valley, and savagely bit a coolie in the arm. 
It was found necessary to camp on a ridge of some 1200 metres 
on the boundary, water being brought up daily by the coolies from the 
valley 700 metres below. The trees at that elevation are entirely clothed 
with mosses, tree ferns and orchids, and many of the outer trees are 
stunted, there being no high ranges on the Tenasserim side at that 
point to lessen the force of the S. W. monsoon, 
The Grey-headed Imperial Pigeon (Carpophaga griseveapilla) was 
obtained here. The call is a peculiarly deep ‘‘er-woob-woom” and I have 
