394 MONOMANIA IN DOMESTIC ANIMALS. 
rushed on it with the greatest fury, and bit it in a thousand 
places. She generally, however, seized the animal by the head 
or by the throat, and held it so fast that she would suffocate it 
if it were not promptly released from her bite. 
As she grew old (for she was eighteen years old in 1821), this 
mania was not quite removed, but it was somewhat weakened. 
No other body of a white colour appeared to make the least im¬ 
pression on her. 
CASE III. 
A mare, belonging to the fifth squadron of hussars, feared, on 
the contrary, all white inanimate objects—such as white mantles 
or coats, even the sleeves of shirts and chemises too much dis¬ 
played, and particularly white plumes. When any of these 
white bodies, and especially in motion, were suddenly perceived, 
if they were of any magnitude, and their motion was rapid, she 
was in a dreadful fright, and strove to escape; but if they were 
of no great size, and moved more gently, she rushed furiously 
upon them, struck at them with her fore-feet, and endeavoured 
to tear them with her teeth. No other colours produced the 
slightest effect upon her, nor did the appearance, however sud¬ 
den, of white horses or dogs of the same colour; but if a white 
plume waved, or a white sheet of paper floated by her, her fear 
or rage was ungovernable. 
These three cases of singular and particular aversion, possess, 
in my mind, all the characters of true monomania. 
Of Delirium, and of the acutest form, we have numerous 
instances in the quadruped. I need not mention the eagerness 
to bite displayed by the dog labouring under enteritis, as well 
as by him that is rabid ; the cerebral disorder which induces 
some animals to press constantly, and unconsciously forward, as 
in horses labouring under vertigo; the eagerness to strike at 
every thing with the foot, and to rush upon it and to seize it 
with the teeth, observed in phrenitis, or other stages of staggers. 
IJinally, perhaps, every acute delirium, except that of rabies, 
under which the animal lives only a short time, may pass into a 
chronic state, and produce insanity of indeterminate duration, 
corresponding perfectly with the insanity of the human being. 
A kind of Nostalgia is often recognized in the quadruped, in 
that depression which nothing can dissipate, and that invincible 
aversion to food, by means of which many animals perish, who 
are prevented from returning to the places where they once lived. 
We have frequent illustration of this in the cat, and occasionally 
in the dog, who obstinately persist in their attempts to return 
to the localities to which they had been accustomed. 
Of Melancholy and Ilypochondriasm we have abundant 
