Has anyone seen the terminals in Halo 3......

They containt letters and reports from 2 beings  Librarian and Diadact. They write to each other of cataloging species and the 'line'. The line is a sort of quarantine zone( from the 'Mind' or the flood). Diadact becomes is building 'gateways' to the ark....Yes he actually uses those words.  In some of the later terminals 5 or 6 i believe, Diadact mentions he is on an 'Eden' and the inhabitants are special, and that Librarian should have seen them. Librarian writes back that he knows where Diadact is and can imagine him in his garden of 'Eden'.  Diadact then writes to Librarian that he has erected a mountain over the gateway and he waits for the mind.    I cant quite recall but the idea is the same.  Draw what you will from this.

Legendary Terminal 6 tells of a gigantic space battle and the author of the report  an AI mentions his creators have commited species wide suicide and his report will never be read. The flood is defeated.