Everyone who knows about the coortana letters must surely realise that these wern't just posted as a gag from bungie. I have just given them a read through and think I have found a meaning in some of them. I know i might not have found anything but...
Letter 1) "I was there at the angel of the tomb": I belive that this is Coortana and the master chief in a climax in Halo 3: Think about it. If the covenant is refering to the chief as the Demon, Coortana, even though noone else will might call him the master chief in the tomb in which I am only assuming as the
Resting place of "Holy grail"
Letter 2: "It is a blurred line that lies at the edge of Godhood and Insanity. Guess which side of it I am on": Well I am theorising that Bungie has planned the fall of coortana but not to the covenant or the flood. Her 7 years are up or the gravemind is corruptng her ad she is bent on destroying all.
"the Giants who formed this world": The forunners I am assuming where in on our solar system or lived on Earth and considered it to be of vital importance to place wat I belive is the grail in the Halo 3 trailer.
Letter 3:"I may manipulate to communicate with you": my theroy comes to the Gravemind and coortana. The manipulation must be able to work both ways."I am still not sure what he ever saw in you": Either I believe the person doing the seeing was either the chief refering to the arbiter, or the gravemind refering to the chief and the Arbiter
I'll try to find some more secrets Which i think they r but l8r
