The predecessor to Helen Macdonald’s H is for Hawk, T. H. White’s nature writing classic, The Goshawk, asks the age-old question: what is it that binds human beings to other animals? White, the author of The Once and Future King and Mistress Masham’s Repose, was a young writer who found himself rifling through old handbooks of falconry. A particular sentence—”the bird reverted to a feral state”—seized...