A copy of the note makes it's way to Freehaven, into the hands of Dannjl Still, who has been known to pay good coin for news and information on such topics. He scans it quickly, and formulates a response.
Anastasia
I believe I know the tower of which you speak; it lies in the Dagger Hills, in giant territory, and seems to have an entrance halfway up the structure. Alas, my attempts to scale it have failed; there are either wards or long-forgotten architectural defense blocking my path.
It does bear a certain resemblance to some architecture I've seen in Thay; reminiscent of ancient Imaskari desgins (which mostly pre-date the grand structures of the Netherese, in fact), but I have not uncovered any historical records of Imaskari outposts this far east; not in the Dales anyways.
Assuming we speak of the same construction, I too am anxious to explore the tower. As someone with a little experience with Imaskari ruins, as well as an avid interest in archeology, I'm sure I could be a valuable addition to any expedition planning on entering the site.
I would love to hear whatever information you have uncovered; please write me back.
Dannjl Still