[8]. Humane Science Lectures: Summary of address given by Prince Kropotkin at Essex Hall, November 17, 1896.
[9]. "Study of Animal Life."
[10]. "Evolutional Ethics and Animal Psychology."
[11]. Wollaston, "Religion of Nature," 1759.
[12]. December 29, 1898.
[13]. Fortnightly Review, November, 1895.
[14]. The Ethical World, May 7, 1898.
[15]. Ibid.
[16]. Fortnightly Review, November, 1895.
[17]. Illustrated London News, May 14, 1898.