ACROSS UNKNOWN SOUTH AMERICA 
Where we landed there were two separate islands, one 
of which I named after my sister, the Elfrida Landor 
Island; the other one, next to it, I named Francesco 
Island. The Elfrida Landor Island, really most beautiful 
to look at, was 800 metres long; Francesco Island was 
1,200 metres in length but not quite so broad. 
There was a most picturesque channel, 200 metres wide, 
with marvellous rocks forming a barrier across it, on the 
right side of the river, between Francesco Island and the 
right bank. The main part of the stream, however, flowed 
in a much larger channel between the left bank and 
Elfrida Landor Island. 
The joint Arinos-Juruena River had now a total width 
of 500 metres, and flowed in a direction of 15° bearings 
magnetic. I took accurate observations with the hypso- 
metrical apparatus in order to determine the exact 
elevation of that important spot: water boiled at the 
junction of the Juruena and Arinos at 210°.4%, while 
the temperature of the air was 70° Fahrenheit; in other 
words, the elevation of the place was 987 feet above the 
sea level. 
I also took observations there for latitude and longi¬ 
tude. Latitude 10° 21'.7 south; longitude 58° 35' west. 
The Juruena entered the lake from bearings magnetic 
250° (west-southwest), the Arinos from bearings mag¬ 
netic 100° (east-southeast). The minimum temperature 
during the night on Elfrida Island was 57° Fahrenheit. 
My men suffered a great deal from the cold, as they had 
become badly chilled with the wet and the high wind 
during the day. Most of them complained of severe 
rheumatic pains and violent toothache. They cguld not 
understand why I did not have any pains of any kind, 
and to tell the truth, neither could I, after all we had 
gone through of late. 
When we left Elfrida Landor Island on July twenty- 
fifth we had a beautiful stretch of river 4,000 metres 
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