ANXIOUS TRAVELLING 
volcanic debris were found. A small tributary two metres 
wide at the mouth entered the Arinos on the left bank, 
not far from the spot where a rocky rugged island rose 
in the centre of the stream. 
I halted at 11.30 in order to take the usual observations 
for latitude and longitude and soundings of the river. 
The stream, which was 320 metres broad, below some 
rapids, showed a depth of six feet the entire way across. 
Farther down, where it contracted to 200 metres in 
breadth, it showed a depth of eight feet in the centre with 
a maximum depth of ten feet to the right and left of it, 
gradually decreasing to five feet, three feet, two feet, and 
one foot as it neared the banks. Latitude 11° 71'.3 south; 
longitude 57° 46' west. 
When we resumed our journey after lunch, we came 
to another thickly wooded island, 1,000 metres long, 350 
metres wide, J. Carlos Rodriguez Island, with a cluster 
of huge rocks on its southern end. 
We had a few minutes of comparatively easy naviga¬ 
tion, the river being extraordinarily beautiful in straight 
stretches of 3,000 metres, 2,000 metres, and 3,000 metres, 
to 340°, 350°, and 360° (north) bearings magnetic. In 
the first 3,000 metres we came upon another strong rapid 
over a barrier of rocks which extended right across the 
stream. Beyond the rapids the usual troublesome whirl¬ 
pools occurred. A polished dome of rock ten feet high 
emerged in mid-stream. Then another charming island, 
Nona Island, with a spit of white sand at its southern end, 
rose gracefully out of the river. It had a breadth of 
100 metres and a length of 600 metres. 
More corrideiras and eddies had to be gone over that 
day. We seemed to be spending our entire time trying 
to avoid — not always successfully — collisions with dan¬ 
gerous rocks. We came to another beautiful island, 200 
metres long and 100 metres wide, Emma Island, screened 
at its southern end by high-domed volcanic rocks, and soon 
101 
