George Agar Hansard, Once a Week (1863)
“ By pursuing this treatment, your hawks, which are by nature exceedingly intelligent, and, when subdued, fond of human society, speedily learn to challenge, the moment they hear the whistle and voice of their keeper. This they do by uttering a loud, chirping note, and as soon as their pinions are grown they will leave their hamper at their master’s well-known call, and, flying towards him, perch upon his head, arms, and shoulders, eager for the expected meal. ”
