- League for Prohibition of Cruel Sports30
- National Society for the Abolition of Cruel Sports23
- Animal Welfare Institute4
- Kaufman, C. M.4
- Stevens, Christine4
- American Humane Education Society3
- American Society for the Prevention of Cruelty to Animals3
- Freeman, Edward A. (Edward Augustus), 1823-18923
- United States. Congress3
- Chancellor, H. G.2
- Moore, J. Howard2
- Salt, Henry S., 1851-19392
- Society for Animal Protective Legislation2
- Amos, Henry B.1
- Animal Defence and Anti-Vivisection Society1
- Animal Liberation Front1
- Bacon, Francis, 1561-16261
- Bergh, Henry, 1811-18881
- Buffet, Edward P. (Edward Payson), 1873-19301
- Clodd, Phyllis1