"Well," Waver said, settling in. His voice slipped into lecture mode, quite content. "Within my home school of magecraft, there are five defined Magics. One relates to the operation of parallel universes. Those were discovered by people actually obtaining this particular form of Magic, and being able to move between universes and then return to ours in order to describe it."

He paused, then had to admit, "That all sounds dreadfully straight forward doesn't it?"