1. F. C. Godman, "Ibis." 34, "Anniversary Meeting of the British Ornithologists' Union, 1892." 474 (1892)
2. "Bull. Brit. Orn. Cl." 1, "List of members. 1892." vi (1893)
3. E. Degen, "Bull. Brit. Orn. Cl." 2, "On some of the main features in the evolution of the bird's wing." vii (1894)
4. Gainsborough, Earl of., "Bull. Brit. Orn. Cl." 15, "The Earl of Gainsborough observed…]." 77 (1905)
5. H. Saunders, "Bull. Brit. Orn. Cl." 1, "The Treasurer stated that…]." liii (1893)