"Two weeks... well, it's cutting it a little close, but that should be all right," says John. "I was going to suggest you ask any of the Ghostbusters there about some of the entities that we're dealing with, as a sort of briefing out of time. Since it doesn't look like that's going to work..."

He turns and rummages through a brown accordion folder before coming up with a sheaf of papers. One of them is a map of the Earth's magnetic fields, with some pronounced spikes in the red areas and a few others in places like western Australia and off the coast of New England. The red spot in the Canadian Arctic archipelago contains the highest spike of all.

"This isn't much more than a skeleton briefing, I'm afraid. I'm going to have to ask you to read over these when you get home. We'll be in contact with you when we can, but if you reach any of the Ghostbusters before a Ministry agent sees you next, talk to them about it. Of all the private agencies still in operation today, they probably know the most about what's going on."