W. H. Hudson was brought up on the pampas, where he learnt from gauchos about frontier life. After moving to London in 1874, Hudson lived in extreme poverty. Like his friend Joseph Conrad, Hudson was an exile, adapting to England. He never returned to Argentina. Wilson unravels Hudson's English dream, his natural history rambles, and his work to protect birds. He remains both a complex witness to his homeland before mass immigration and to his England of the mind, before the urban sprawl.