with gigantic trees which supported lianas of many different shapes, 
varying in thickness from that of ordinary cord to the heaviest cable* 
After having followed the river to its source I found myself on a far 
reaching table-land about 150 meters above sea level. At S.W. the 
land gradually fell until far away in the distance it met a high com¬ 
pact mountainous region which seems to occupy a great deal of the 
southern half of the island. At 8. and E. the land is surrounded by 
mighty hills covered by centuries old primeval forest. 
In the northern part of the cove which served us as harbour 
1 had detected the outlet of another, considerably larger river, and 
the following day was used to investigate it further. I took Jose 
with me who was the best of my Colombians. 
The exploration of this river was made difficult since near 
the outlet it flew# between two precipitous mountain sides and forms 
here a 15 - 20 meter high waterfall. When we came to the lower basin 
of the fall we decided to go round the waterfall on the southern side 
of the river. It turned out to be one of the most difficult and 
dangerous journey I have made. low crawling under thorny shrubbery on 
the top of the mountain, now using strong lianas as swings to cross the 
crevices of the mountain, now climbing out toward its precipitous sides 
on roots and branches of trees, we finally passed the waterfall, came 
down to the river again and continued with comparative ease our journey, 
wandering in the water or on the bank. Bore above the waterfall the river 
had a vidth of 20 - 25 m., and still 3 kilometers from the outlet the 
average width was 12 - 15 m. 
