Mural World(Petroglyph)
The Birdman cult was suppressed by Christian missionaries in the 1860s.
http://en.wikipedia.org/wiki/Tangata_manu
http://en.wikipedia.org/wiki/Petroglyph
The origin of the cult and the time thereof are uncertain, as it is unknown whether the cult replaced the preceding Moai-based religion or had co-existed with it. Katherine Routledge was, however, able to collect the names of 86 Tangata manu.[1]
Mural World(Birdmen)
Rongorongo (pron.: /ˈrɒŋɡoʊˈrɒŋɡoʊ/; Rapa Nui: [ˈɾoŋoˈɾoŋo])
Rongorongo is a system of glyphs discovered in the 19th century on Easter Island that appears to be writing or proto-writing.
http://en.wikipedia.org/wiki/Rongorongo
↓
Rongorongo_X_Birdman
http://en.wikipedia.org/wiki/Rongorongo_text_X
Mural World(Not Birdmen)
Harpies remained vivid in the Middle Ages. In his Inferno, XIII, Dante envisages the tortured wood infested with harpies, where the suicides have their punishment in the seventh ring of Hell:
http://en.wikipedia.org/wiki/Harpy
William Blake was inspired by Dante's description in his pencil, ink and watercolour "The Wood of the Self-Murderers: The Harpies and the Suicides" (Tate Gallery, London).