144 JOURNAL, NATURAL HIST. SOCIETY OF SIAM Vol. I. 
and on scratching, mud or dirt penetrated, poisoning the blood and in- 
capacitating them. 
On the day of arrival we found the fresh tracks of elephant, 
rhinoceros and tapir; but it was surprising to find the black langur 
(P. femoralis) staying on the exposed ridges during such weather, when 
even the gibbons were silenced, and also numerous small passerine 
birds including flower-peckers, fantail-flycatchers and babblers. A big 
flock of hill partridges haunted the camp, and on the 2nd August a green 
jay (Cissa chinensis) was obtained, one of a party of five. On one 
occasion when going to the Trig. station, for the daily dreary wait for 
a break in the clouds, a large herd of pig were observed feeding within 
20 yards of the ridge summit, all unconscious of oue presence ; and so 
they remained, for the guns had been sent in another direction to 
secure langur meat. 
It may be of interest to mention that wild pigs make nests, and 
when first I struck one of these I took it to be the nest of some archaic 
bird, but the coolies recognised it immediately as a pig’s nest. Several 
have been observed, entirely composed of sticks ranging from the size 
of a finger to an inch in diameter, all having been bitten off from the 
jungle around the nest. The pile is rather less than 3 metres broad 
by 1 high, and the pig tunnels beneath the pile. Blanford mentions 
that in India pigs make nests of grass, but in the evergreen jungle 
there is little or no grass. 
During this year I came across another nest or shelter 
which puzzled me considerably. At an elevation of 850 metres on the 
boundary, I found a rough shelter formed of leafy branches, thick end 
uppermost and supported by a thin clump of small bamboos. ‘The 
branches appeared to have been arranged methodically, and looking for 
the mark of a knife, | found that the branches had been bitten and torn 
off from the tree overhead, which was stripped of its smaller branches, 
some of which had not fallen to the ground but lay withered in the forks 
above. A bear’s claw marks were visible on the tree, so it is a point 
for investigation as to whether bears form some sort of shelter during 
the rains. 
On the 13th day of our sojourn in this inhospitable region the 
clouds lifted for short periods, and on the 4th August the sun broke 
through for 3 hours, enabling me to complete the work on the bound- 
ary. The following day the return journey was commenced in the 
