The Maori: Genealogies and Origins in New Zealand contrasts with "The Raven and the First Men: The Beginnings of the Haida" in the following way. The Raven is a central character in Haida mythology. He is sometimes known as a trickster, but the Haida believe that Raven is a complex reflection of myself. In Maori mythology the Maori believe there was nothing in the beginning. The beginning was made from nothing. The original parents, the Earth mother and the Sky father came from this nothingness. They had 70 male children who, in turn, became the gods of the Maori.
The sentence should be "Send the letter to whomever is editor in chief", since in this case the person receiving the letter is the indirect object, and that is when "whomever" is used.
