4 MR. H. N. RIDLEY ON PLANTS 
Camp III was situated on the southern slope of a range of foothills the summit of 
which, 3000 ft. high and half-an-hour’s journey from the camp, was known to us as 
Observation Point: for from a clearing there, Mt. Carstensz and its snows (26 miles 
away) and the intervening country, together with the mountains west and east, from 
Tapiro Peak to the Linnæus Tops, were visible on. clear mornings. 
The hills culminating in Observation Point are to be regarded as mere outliers of 
the main mountain ranges, from which they are separated by valleys wherein run 
streams the beds of which probably in no case exceed 1000 ft. in altitude. But 
though of equal elevation with Camp VI a, where collecting was done later on, it 
will be seen that the flora of the two localities differs considerably. As pointed out, 
Camp III and Observation Point are practically detached from the main ranges, while 
Camp VIa lay well within the mountainous region. But the former, being the first 
depot camp on the route to the snows, was occupied for a considerable period, and 
possibly a fuller collection was made in its neighbourhood than elsewhere. 
From Camp III a course was taken along the side of Observation Ridge and 
thence across gradually-falling, much-watered land with limestone outcrops to a river 
whence a watershed was reached, with a descent to a second river at 900 ft. ; then 
up along high ridges and down to Camp IV, at 1100 ft. on the bank of the Utakwa 
River, which we had last been in touch with some distance below the Base Camp. 
Four days marching from the Canoe Camp had brought us to à point on the main 
stream some 141 miles distant to the N.E., and situated at the foot of the frontal 
range. 
From Camp IV to Camp V the frequently steep banks of the Utakwa River were 
followed for about 21 miles; then a route was taken for some distance up a tributary 
running between high precipices and steep banks: this was left for hills which 
carried the track up to 2500 ft., and a descent was again made to the Utakwa, where 
Camp V was placed at an altitude of 1775 ft., half a mile above a conspicuous landslip 
across the stream. 
Between Camp V and Camp VI the march was kept as close to the river as possible; 
once or twice, as in the previous section, the way being taken through the water itself. 
The highest ground passed over was less than 150 ft. above the terminal camp, which 
was placed on a point contained by the Utakwa—now the Tsingarong—and the 
Kemarong, a western affluent, at a height of 2115 ft. 
No systematic plant-work was done at Camp VI, the second depot, as it lay in a basin 
surrounded by steep hills; but at a subsidiary Camp, VI a, 3050 ft., on the western bank 
of the Tsingarong (which was followed from here onwards), collecting was carried on for 
some days. This camp was situated in one of several grassy clearings on a ridge. 
A second Camp, VI b, 4475 ft., was later established on the shoulder of a ridge 
dropping io the Tsingarong and divided from VI a by broken country and several 
streams. 
e 
ibidcm 
