Ummmm the Gardener is the Traveler. There is grimoire card speaking about it, the one that talks about a survivor, that is Rasputin. And the Speaker is the Astronaut that travel to Mars to see what was happening. Its in another Grimoire Card. Where you find the the info to say that Hunters Order was founded before Warlocks one? And about Fallen, i think they were trying to scape from the darkness and trying to be under the proteccion of the Traveler. Why they attack the Tower then? Because they want the protecion of the Traveler too, and the humans dont understand them. I assume that the Fallen is another civilization that was abandoned by the traveler before. I thinks there is some card talking about the feels of the Traveler and saying that this time he will not run. Edit: Another thing that make me thinks that the Fallen is an abandoned race, is that they seems to have a related culture with Traveler because they adore Big Robotic Spheres. Maybe this Primes were Fallen version of the Ghosts, and the Archonts old Fallen guardians.