Bella follows closely, preoccupied, thinking about what could have made her window explode.

"What sorts of things make magic windows explode?" she asks as they emerge from between the trees.

"Looking at locations that are unfriendly to divination. Some places have that naturally - there are spells that will do it, almost certainly including wizard spells. It's also possible that I was caught looking and the explosion was someone deliberately reacting to it." Bella rubs at her cheek; bits of dried blood flake off.

"No one likes to waste," Sherlock remarks. "If they had a location with that property available, they may well have put her there to avoid the expenditure of having to bespell it themselves."

"Quite possibly. I don't know this area, though, and even though I could heal myself I'm not fond of the idea of having my specs explode while I wear them to look for it..."

"That should not be necessary," says Sherlock. "We can follow them until we find either a wizard or the residue of a transport spell. The former will yield answers to me, the latter to you."

"I've - I think I told you I'm good with glass - I don't have a lot of non-spec-based divining options. If you can point me at the exact location of some transport spell residue I can put it through my marble and have a look at it that way, but I don't have a good method for finding it in the first place unless we want to spend hours sitting here while I think of something."

"I will easily be able to pinpoint the exact location of the transport spell residue, if we come upon it."

"Okay then."

"In the meantime: this way."

Bella follows solemnly.

Sherlock seems very sure of where she is going, despite a lack of obvious signs.

Bella starts murmuring to her marble. Something about whatever she's doing makes her look tired.

"Hmm?" says Sherlock.

"If we're going to encounter wizards it's safer to have more of my magical energy in the marble where they can't take it than sitting in my witchwell and so on."

"Reasonable."

"Yeah, I just don't usually feed it much magic all at once. I won't overdo it, I'd be no use then."

Sherlock nods, inspects a stone on the ground, and keeps walking.

Bella eventually gets to the point where feeding her marble any more would be unwise, and stops.

Sherlock continues to follow a trail no one else can see. She's going slower now, though.

"Do you know anything else yet? Besides where to go?"

"Very little. Nothing I could easily put into words."

Bella nods, and continues following. "I could scout from the air but I doubt I'd be able to report the kinds of things you're looking at."