A third instance I may give as regards the way in which wild animals readily become domesticated, and eventually seem to prefer the society of man to that of their own species. In this case my pet was a hornbill, a bird of discordant note, and with a huge beak, and a box-like crowned head. This creature was also totally unrestrained, but showed a most decided preference for the society of man. One day it joined some of its species which made their appearance in the jungle near my house, but soon got tired of or disgusted with them, and speedily returned to the bungalow. It used to swallow its food like a man taking a pill, and it was surprising to observe the ease with which balls of rice of about the size of two large walnuts were dispatched. On one occasion it flew off with my bunch of keys, but was luckily seen by my servant, who gave the alarm. The bird threw back its head the moment it alighted on the first convenient branch, and it was only from the ring sticking in the front of its beak that it was prevented from swallowing the entire bunch. Finding my people close upon it, the bird flew away to a piece of forest some hundreds of yards away, where it seemed to take a most aggravating pleasure in dangling my keys from the tops of the loftiest trees, and it was some time before it let them drop, which I conclude it at last did merely because it could not swallow them. Now, though none of the pets I have mentioned were made miserable by restraint, and evidently must have found themselves perfectly happy in the society of man, it is very remarkable that, though all of them must have had (and the bird certainly had) frequent opportunities of making the acquaintance of their species as they roamed the jungle at night, they regularly returned to the society of man. I can only conjecture that the force of habit must have, as it were, chained them to the place they had become accustomed to. It is difficult to guess at any other reason than the force of habit, but it is just possible that the following fact may have something to do with their neglect of their own species. It is well known that a great many animals and birds refuse to, or cannot, propagate their kind when in a state of confinement. Now these pets of mine, and the stag which belonged to my neighbour, were not indeed confined in any sense, but it is just possible that the altered conditions under which they lived may have acted on their animal desires, and so have rendered them indifferent to the society of their species. Or perhaps it is conceivable that, in consequence of their living in or about an inhabited dwelling, they may have contracted bodily impurities which may have been perceptible to their wild congeners.