1. AJS (1902) Cruelty in training animals. Letter The New York Times 19 October, p 30
2. Altick RD (1978) The shows of London. Belknap, Cambridge, MA
3. The Animal World (1919a) Trained animal performances, June, pp 69–70
4. The Animal World (1919b) September, pp 99–100
5. Anon (1869) Haney’s art of training animals. A practical guide for amateur or professional trainers. Giving full instructions for breaking, taming and teaching all kinds of animals including an improved method of horse breaking, management of farm animals, training of sporting dogs; serpent charming, care and tuition of talking, singing and performing birds; and detailed instructions for teaching all circus tricks, and many other wonderful feats. Jesse Haney, New York, NY