484 
ANIMAL INTELLIGENCE 
or note-book, in which all the observations that she 
made when I was absent were entered. It was originally 
my intention to make an abstract of this note-book ; but 
on afterwards reading it through for this purpose, it 
seemed to me that I should rather spoil matters by 
attempting a condensation. There is a certain graphic 
effect incidental to the diary form and spontaneous style 
of diction — the notes, of course, not having been written 
with a view to verbatim publication ; and besides, as the 
psychology of monkeys has been so little studied, I think 
it is well to give all the details of a continuous series of 
observations. It is desirable to add that on occasions sub- 
sequent to the taking of this or that particular note, I 
generally had the opportunity of verifying the observation 
myself ; but I may state that I attach no more importance 
to this circumstance than I should to verifying an obser- 
vation of my own ; for as a careful observer of animals I 
have quite as much confidence in my sister as in myself. 
It only remains to explain that my mother, being an 
invalid, is confined most of the time to her bedroom ; 
and that the monkey was kept there for the first six weeks 
of his stay at her house, partly in order that he might be 
under constant observation, and partly also to furnish her 
with an entertaining pet. The following are my sister’s 
notes in extenso and without alteration : — 
Brown Capuchin ( Cebus fatuellus — Linn.), Brazil . 
Diary, 1880. 
December 18th. Arrived in box with keeper. Seemed rather 
frightened and screamed a good deal on being transferred from 
small box to a larger one. 
19th. Took him out of the box he had been in all night and 
fastened chain on to collar. Was. meek and subdued, hiding his 
face in my lap. 
20th. Has become much more lively and somewhat aggres- 
sive, especially towards the servants. He has taken a fancy to 
my mother, and (she holding his chain) he plays with her in a 
gentle and affectionate manner in her bed, but flies angrily at 
any of the servants who come near the bed. I observed to-day 
that he breaks walnuts (which are too hard for him to crack 
with his teeth) by striking them with the flat bottom of a dish 
