ACROSS UNKNOWN SOUTH AMERICA 
and waste of energy, so that we had to halt longer than 
usual in the middle of the day. 
Our halting-place was most picturesque, situated on 
volcanic rocks of great beauty, and overlooking a canal 
cut into the rocks, with strong and foaming rapids from 
east to west. Strong eddies formed at the end of the 
rapids. 
After leaving the camp and negotiating the rapids, 
we came to an island, 150 metres long, Magda Island, 
separated by a rocky narrow channel from another island, 
50 metres long, west of it. 
After the last rapid we were in a basin 800 metres 
wide and 1,000 metres long. Strong corrideiras or 
rapids occurred all the time, and rocks alone or in groups 
standing wherever they were not wanted. Farther on we 
came to another big basin, 1,000 metres wide, with a 
square island on its western side. The island, Eva Island, 
was 400 metres broad and of course of an equal length. 
Another island, triangular in shape, 700 metres long, 
Rose Island, was then observed, after we had gone 
over some strong rapids in the passage on the east 
side of it. 
The river was flowing in a northerly direction, and 
shortly afterwards formed two channels, one northwest, 
the other southwest, which soon joined again. 
A beautiful bank of white sand 120 metres long and 
four feet high stretched along the edge of the water on the 
left side of us. Soon afterward we entered an immense 
basin, 1,300 metres broad, with a large island, May Island, 
on its western side. 
One kilometre farther on the island ended at a place 
where a lot of rocks stood out of the water. A little 
lower down other rocks spread right across the river in 
two parallel lines, forming very strong rapids, which were 
shot, our canoe coming within an ace of turning over. 
The basin which followed was extremely rocky, with 
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