 Among them are Philip Percival, who guided Theodore Roosevelt and Ernest Hemingway, themselves famous big game hunters; Bror von Blixen-Finecke, a friend of Percival's and husband of writer Isak Dinesen who wrote "Out of Africa"; Denys Finch Hatton, who was also a character in Dinesen's book; Major Percy Horace Gordon Powell-Cotton; and others.Many big-game hunters are also conservationists (Roosevelt and Hemingway are examples), and currently big-game hunting in Africa helps pay for conservation efforts, with very large fees from the hunters going directly to wildlife management.Various big-game hunting methods have been developed over centuries.