She couldn't exactly just send a letter to the palace saying 'hey, about that servant I asked you to banish to Nial, have you done it yet, or are you reneging on that deal too, you lying, scheming-'
Well.
She couldn't just write a letter like that. Who would she even address it to? 'Miss Definitely Not Princess Airie, Wherever She May Be Hiding'?
Even if she could talk to Airie and get a message back, it wasn't as if she could trust Airie to tell her the truth. After all, the entire point she was thinking about that letter was because she couldn't trust Airie.
The entire reason she was sitting in Sidera, political prisoner, plotting escape before her inevitable death, was because she couldn't trust Princess Airie.
Which was...
She pressed her fingers to her lips and stared down at the atlas.
Was...
The most effective way of checking if Laine were in Aurania still simply visiting?