have silver bars and completely ransacked the archive , how do I make the keys for the statues ? the spirit of the archivist has not appeared , ?

The Archivist should be visible through spiritvision, if he does not appear despite using spiritvision..then he is linked to some desicion you can make at the island.

The Statues don't need keys, to remove them you char needs the knowlegde about a Song/hymne.