Thread:Prof. Draco/@comment-30644608-20170218002528/@comment-30644608-20170218235343

The Grays Sports Almanac is an Almanac that Marty McFly bought in the future (2015) during the second Back to the Future movie. It was later stolen by Biff Tannen (along with the Delorean) so that he can take it back to his younger 1955 self in order to become very powerful. (Like, take over the whole town, powerful.)

As for Christie, I agree with you. Perhaps she heard about the Warehouse from an American friend of her grandmother's who worked alongside the Agents as an outside resource? Once she retired, she told Agatha about all her adventures.

The whole artifact question really came as a story idea. Sarah is an unexplainable phenomenon who has many loose ends about her identity. Wouldn't someone entertain the possibility that there are a lot more people on her world with odd talents, and that she might be one of them? Perhaps her whole world is like her: enigmatic and able to travel anywhere and everywhere they want? Just a thought.