“In a few cases only. Nothing will make me believe that an acre or so of concrete enclosure will make up to a wolf or a tiger-cat for the range of night prowling that would belong to it in a wild state. Think of the dictionary of sound and scent and recollection that unfolds before a real wild beast as it comes out from its lair every evening, with the knowledge that in a few minutes it will be hieing along to some distant hunting ground where all the joy and fury of the chase awaits it; think of the crowded sensations of the brain when every rustle, every cry, every bent twig, and every whiff across the nostrils means something, something to do with life and death and dinner. Imagine the satisfaction of stealing down to your own particular drinking spot, choosing your own particular tree to scrape your claws on, finding your own particular bed of dried grass to roll on. Then, in the place of all that, put a concrete promenade, which will be of exactly the same dimensions whether you race or crawl across it, coated with stale, unvarying scents and surrounded with cries and noises that have ceased to have the least meaning or interest. As a substitute for a narrow cage the new enclosures are excellent, but I should think they are a poor imitation of a life of liberty.”