The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Expression of Emotion in Man and Animals by Charles Darwin:|
certain expressive gestures; for it is Dot probable that these animals,
confined in cages, should have learnt them by imitating dogs.
 Many particulars are given by Gueldenstadt in his account
of the jackal in Nov. Comm. Acad. Sc. Imp. Petrop.
1775, tom. xx. p. 449. See also another excellent account
of the manners of this animal and of its play, in `Land
and Water,' October, 1869. Lieut. Annesley, R. A., has also
communicated to me some particulars with respect to the jackal.
I have made many inquiries about wolves and jackals in
the Zoological Gardens, and have observed them for myself.
 `Land and Water,' November 6, 1869._Cats_.--I have already
Expression of Emotion in Man and Animals