silveroak is correct. You were originally sent here to recover the documents. no one realized that Flavia was in Paris. She'd disappeard in the Roman Tribunal, and the search effort was going on down there. Not that rescuing Flavia wasn't an important thing, once you learned she was there. But that was meant as a surprise.
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In the Alleyway Near the House
[color=orange]"Roberto sez to get Flavia to safety," Cidito reports. [color=orange]"After that, you'se in charge here. Just get the girl back to the safehouse. That's where Roberto will be."
"Roberto's right," Lucas says. "We need to keep you out of their hands, Flavia. If they capture you again, they're likely to immediately resort to mentem magic to get what they need. We have a safehouse near the river that we've been reinforcing for the last couple of days. They'd be hard-pressed to take you there."
"The real question is how important the scrolls are that they're holding." He looks inquiringly at Flavia.
"Very," she replies. "Andreas may be a plodder, but he'll eventually figire things out. That or they'll bring in someone else who can. I'm sure they can use blackmail or something similar to get a proper scholar to look at the documents. They've already learned far too much."
"Right, then," Lucas continues. "We'll need to go in once more to get the scrolls. The real question is now or later?"
"Right now it's broad daylight and they may be on alert. Not the best time for an assualt. I've been inside and seen where the documents are probably located. The room is locked and there are guards just a few paces away. I could get in and open the door, in all likelihood. But then it gets chancy. I might be able to put Forratus to sleep, though in this Aura I can't be certain."
"It's a level four Dominion Aura," Flavia adds and smiles. "Auras are kind of a specialty with me."
"The danger is that Forratus might cry out, or one of the guards might hear the door and come to investigate. In that case, things could go downhill quickly. Then it's a matter of whether I have to search around for the scrolls or not."
"I suppose," he adds as a thought occurs to him, "I could put him to sleep through the window - my sleep spell is sight-ranged. Then I could leap in and search the room. Better yet, leap in first and sleep second so that I can catch him if he falls out of his chair. Still, I'd feel better if there were some kind of distraction going on to draw the guards away. Vibria do you think you could manage a distraction while Rilcheaux and Cidito escort Flavia to the safehouse? We can use the crowds to our advantage. Given that this is their base of operations in Paris, they're probably more worried about casting flashy magic here than we are. And the Aura effects them as much as it does us. The big threat is really the mundane guards. And they can hardly have them drawing steel on a Paris street in broad daylight."
"The next question is when: now or later. Now has the advantage that the team that went off won't be back yet - though if Roberto didn't take care of them, they'll be hack soon. It also means we can take advantage of the protection of the daylight. Later means we can go under cover of darkness, which may or may not be an advantage to us. It also means they'll be at full strength and will know that Flavia is gone."
"For my part, I say we strike while the iron is hot and try for the scrolls now. What do the rest of you think?"
"I'm for that," Flavia replies.
As she speaks, a pigeon settles next to the group.
"What did I miss?" the pigeon says, revealing that it's actually Horus in disguise.
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FWIW, I really thought that being in a level 4 Aura would eliminate most magic in this encounter. I thought it would certainly stop anything covert because the -10 penalty for no words on top of the -12 for the Aura would be too much to allow most spells to go through without drawing attention. I really wasn't thinking of the fact that Lucas can cast without words or gestures.
I also forgot that the Dominion Aura gives a -12 penalty to magical Second Sight. So my invisibility detector in the house wasn't able to do a very good job. 
tl;dr - Let's have Rilcheaux, Cidito, and Horus take Flavia back to the safe house, get Vibria to set up a distraction, and Lucas plan an infiltration.
One of Roberto's planned-ahead plans finally worked! I knew Arachne at the safehouse was a good idea!
