"I recall a theory that stated all magical places are connected magically. According to the model, there are connections between such places through which mana can flow, sort of like datalines in the Matrix. Once the magic came back, some magicians found that these connections actually worked sometimes, allowing spells to be cast beyond normal parameters. Nobody really understands what these manalines are or how they work, but most of the research was done in Britain since there seems to be a high concentration of them crisscrossing the island. A lot of the pathways coincided with a network of religious and archaeological sites charted about a hundred and fifty years ago by a guy named Watkins. His charts don't match the modern ones exactly, I don’t know how; my memory’s kind of fuzzy on the subject. I do remember that these pathways use the name he coined, ley lines. If we can find where bunches of these ley lines meet, we might find a likely place for the ritual."