1. “A Leopard Under The Influence Of Chloroform.” Times, June 15, 1850: 4.
2. Adelman, Juliana. “Animal Knowledge. Zoology and Classification in Nineteenth-century Dublin.” Field Day Review 5 (2009): 109–21.
3. Aitken, William. “On the Progress of Scientific Pathology.” British Medical Journal 2 (1888): 348–58.
4. Akerberg, S. Knowledge and Pleasure at Regent’s Park: The Gardens of the Zoological Society of London During the Nineteenth Century. Sweden: Umea University, 2001.
5. Alberti, Samuel (ed.). The Afterlives of Animals: A Museum Menagerie. University of Virginia Press: Charlottesville, 2011.