Chap. III. 
MORAL SENSE. 
79 
in concert, must be in some degree faithful to each 
other; and those that follow *a leader must be in 
some degree obedient. When the baboons in Abys- 
sinia 16 plunder a garden, they silently follow their 
leader; and if an imprudent young animal makes a 
noise, he receives a slap from the others to teach him 
silence and obedience; but as soon as they are sure 
that there is no danger, all show their joy by much 
clamour. 
With respect to the impulse which leads certain 
animals to associate together, and to aid each other in 
many ways, we may infer that in most cases they are 
impelled by the same sense of satisfaction or pleasure 
which they experience in performing other instinctive 
actions; or by the same sense of dissatisfaction, as in 
other cases of prevented instinctive actions. We see 
this in innumerable instances, and it is illustrated in 
a striking manner by the acquired instincts of our 
domesticated animals ; thus a young shepherd-dog 
delights in driving and running round a flock of sheep, 
but not in worrying them ; a young foxhound delights 
in hunting a fox, wdiilst some other kinds of dogs 
as I have witnessed, utterly disregard foxes. What a 
strong feeling of inward satisfaction must impel a bird, 
so full of activity, to brood day after day over her eggs. 
Migratory birds are miserable if prevented from migrat- 
ing, and perhaps they enjoy starting on their long 
flight. Some few instincts are determined solely by 
painful feelings, as by fear, which leads to self-preser- 
vation, or is specially directed against certain enemies. 
No one, I presume, can analyse the sensations of 
pleasure or pain. In many cases, however, it is pro- 
bable that instincts are persistently followed from the 
16 Brelim, 4 Thierleben/ B. i. s. 76. 
