"Out of the Jungle" (1967); as quoted in "Compassion, the Ultimate Ethic: An Exploration of Veganism" by Victoria Moran, Wellingborough: Thorsons, (p. 31), 1985.
Thomas HODGSKIN (1832). “The Natural and Artificial Right of Property Contrasted. A Series of Letters Addressed, Without Permission, to H. Brougham, Esq., ... by the Author of “Labour Defended Against the Claims of Capital.” [T. Hodgskin. Each Letter Subscribed, “Labourer.”]”, p.24