It is well known how intensely older children suffer from vague and undefined fears, as from the dark, or in passing an obscure corner in a large hall, &c. I may give as an instance that I took the child in question, when 2 1/4 years old, to the Zoological Gardens, and he enjoyed looking at all the animals which were like those that he knew, such as deer, antelopes &c., and all the birds, even the ostriches, but was much alarmed at the various larger animals in cages. He often said afterwards that he wished to go again, but not to see "beasts in houses"; and we could in no manner account for this fear. May we not suspect that the vague but very real fears of children, which are quite independent of experience, are the inherited effects of real dangers and abject superstitions during ancient savage times?
This is an important section that gets into some of the more primal things that were acquired from our ancestors. Mainly this is the fear of the dark or large animals, which would have been more of a danger to our ancestors than they are now. The fact that the fear of the large animals is happening to an infant is strong evidence for this inherited fear.