SAGACITY OF THE TITI MONKEY. 931 
ed the different plates of a work on natural history 
so well, that when an engraving which contained 
zoological representations was placed before it, it 
rapidly advanced its little hand to catch a gras- 
hopper or a wasp; which was the more remarkable 
as the figures were not coloured. Humboldt observes, 
that he never heard of any the most perfect picture 
of hares or deer producing the least effect upon a 
hound, and doubts if there be a well-ascertained ex- 
ample of a dog having recognised a full-length por- 
trait of its master. 
The canoe which they had procured was forty- 
two feet long and three broad. The missionary of 
Atures and Maypures had offered to accompany 
them as far as the frontiers of Brazil, and made pre- 
parations for the voyage. Two Indians who were 
to form part of the crew were chained during the 
night to prevent their escape ; and on the morning 
of the 10th the company set out. The vessel was 
found to be extremely incommodious. To gain 
something in breadth a kind of frame had been ex- 
tended over the gunwale in the hinder part of it ; 
but the roof of leaves which covered it was so low, 
that the travellers were obliged to lie down, or 
sit nearly double, while in rainy weather the feet 
were liable to be wetted. The natives, seated two 
and two, were furnished with paddles three feet 
long, and rowed with surprising uniformity to the 
cadence of a monotonous and melancholy song. 
Small cages containing birds and monkeys were sus- 
pended to the shed, and the dried plants and instru- 
ments were placed beneath it. To their numerous 
inconveniences was added the continual torment of 
the mosquitoes, which they were unable by any 
