"What's known is pretty general," Waver says with a sigh. "Magi aren't like scientists who publish and share information. Families pride themselves on keeping particulars secret, there's...that's a whole complicated thing I can't get into right now."

Mages are dicks, and that is a very different rant. "So far, what's known is that the soul is linked to memories and mind, and the body is the anchor. This is where the general knowledge taps out, but mages are resourceful so experiments over the years with how to transfer that information after the body dies have probably been conducted over the centuries. From what you're saying, they aren't the only people working on the particulars."