"Hmmm. I guess she knows which ships are coming in and can try to spend the next day briefing or mind-controlling them all? It'd have to be mind-control, actually, unless the Conspiracy controls the whole Inner Sea. But that's still thousands of people, and Taldane and Qadiran merchant ships have their own ship wizards and it'd be an enormous provocation to use illegal mind=-control spells on their nationals, they might declare war about it....I think it narrows you down to 'Conspiracy controls the Inner Sea' or 'Conspiracy immersively controls your sensory inputs' or 'Ordinary'. ....maybe with a day you could kick everyone out, close the port to foreign nationals on some plausible excuse and get some fake foreign nationals in their place.
I would need to see the port to guess if that'd work which means Keltham has to assume it would. You couldn't fool anyone who knows any things about ships but Keltham doesn't."