If the First People, built this device and it does what the storyline implies, why did they build it in the first place, only to dismantle it and hide it all around the planet. I'm guessing because its dangerous. Yet seeing how our the scientific community has acted in the series. i.e. Robert bishop develops the toxin that could be used for any number of unspeakable things, instead of destroying it. He hides it in a book. Same goes for walter, who hides the pieces of his DisRay in safe deposit boxes. Even tho it works it just doesnt do it to be condusive to practical use. In fact all of walters work on going places he shouldnt instead of destroying these potentialy dangerous devices he hides them. Well either before or after the First People were wiped out, someone hid the pieces. We havent learned if it had anything to do with the destruction of the First People. But some one did hide it. I'm betting there were two devices one for each universe. Yet the AU seems to be considerably different. For instance the fact that california slid into the ocean over there. Don't see where the "Path Not Taken", has anything to do with california being gone. So who knows what other geographic differences exist in the AU. Seeing as Walternate has run into a wall and can't complete it is because the pieces are destroyed or cant be found, and not being able to crossover as easily as or side. He needs someone here to build it. Not to mention the way Walter has been acting, I'm sure he knows something about it. we don't know how long Walternate has been aware of the First People, or the existence of the device, but I'll bet there being more technologicly advanced than us is because they found some of these pieces and studied them, not unlike walter and willam stealing advanced technology from there world to be used here. like the Digital cell phone walter had in the episode "Peter". Who's to say that walter didnt have access to some information or that was gleaned from some piece of ancient tech to build the things that he did. I can't figure out how in our universe all knowledge and tangible evidence is non-existent on the First People except for a one print book published in 1897. Seems like someones been cleaning up after themselves. If some of the FP still exist, being locked in a secret govt facility being studied for the rest of there immortal life, would be a good enough reason to wipe any reference to them out. Seems like sam weiss has been busy. I bet he's gonna try to stop them from looking for the pieces.