which she did with marked interest for a moment and then turned away. I
tried the same thing over again, but failed to elicit from her the
slightest interest after she had examined the glove.

[Sidenote: SOUND OF WARNING]

It will be observed that when Nellie first discovered the glove moving
on the floor, as she attempted to call my attention in a low whisper,
and as the object approached me she became more earnest, and uttered the
sound somewhat louder, and when she discovered the monster, as she
regarded it, climbing up my leg, she uttered her warning in a loud
voice, not a scream or a yell, but in a tone sufficiently loud for the
distance over which the warning was conveyed. The fact of her whispering
indicates that her idea of sound was well defined; her purpose was to
warn me of the approaching danger without alarming the object against
which her warning was intended to prepare me; and as the danger
approached me, her warning became more urgent, and when she saw the
danger was at hand her warning was no longer concealed or restrained.

Another sound which these little creatures use in a somewhat similar
manner, is a word which may be represented by the letters "c-h-i." The
"c-h" is guttural like the final "ch" in German, and "i" short like the
sound of "i" in hit. This sound is used to give warning of the approach
of something which the monkey does not fear, such as approaching
footsteps or the sound of voices; and this sound Nellie always used to
warn my wife of my approach when I was coming up the stairway. The rooms
which I occupied while I kept Nellie were located on the second floor,
and the dining-room was on the ground-floor; and hence there were two
flights of stairs between, both of which were carpeted. So acute was
her sense of hearing, that she would detect my footsteps on the lower
stairway, and warn my wife of my approach. She manifested no interest,
as a rule, in the sounds made by other persons passing up and down the
stairway, which indicated that she not only heard the sounds of my
footsteps but recognised them. The first intimation she would give of my
coming was always in a whisper. She would first make the sound "c-h-i,"
and then she would stop and listen. She would repeat the sound and
listen again, and as I would approach the door in the hall she would
lift her voice to its natural pitch, and utter this sound three or four
times in quick succession; and when I turned the door-knob she woul