Yeah, as much as he's certain of it himself, he'll mention that he thinks Solvunn is the place Anastasia was talking about. I believe she referred to it as "that damn commune" when describing it, and out of the two options presented, that sounds much more like how Solvunn was described than the Free Cities (a city is far from being a commune, after all). At the very least, Solvunn sounds closer to where he's trying to go.

He's definitely open with that info to people who are looking at going to Solvunn, which is that he thinks it might be where the mage that penned the Stupid Book went after being exiled.