Like all the novels I have written, this one owes much to the help, voluntary or involuntary, of a number of institutions and individuals. I should like to mention the Summer Institute of Linguistics, the Dominican Mission to the Urubamba, and the CIPA (Centro de Investigación y Promoción Amazónica), and thank them for the hospitality offered me in the jungle; Vicente de Szyszlo and Luis Román, my excellent traveling companions in Amazonia; and Father Joaquín Barriales, O.P., the collector and translator of many Machiguenga songs and myths that appear in my book.