[ As much as Thancred might be uncomfortable with the idea that they're providing Thorne with such vital information, which could easily be used against the other nations (and, by proxy, the Summoned in those other nations), Stephen makes a compelling point. This was going to happen either way, and at least now they've managed to take a piece of the pie, so to speak. They're aware of this plot of Ambrose's rather than it taking place under their noses. Thancred is new enough to this world and Thorne itself that he's all too aware of how much is still shrouded in mystery for him, and yet he can't help but hope that over the course of this trip he will be able to learn more of Thorne's inner workings via Stephen and Yennefer.

For him, this quest serves as his first foot in the door, a way to learn of the kingdom in its entirety and a get proper lay of the land beyond what maps can offer. It also provides him with the space to converse with his fellow summoned while not under the thumb of Thorne's elite. All of which is well worth the price they're paying, he would think. He already feels like a weight has been lifted now that they're able to speak so openly.

Thancred's quick to chime in on the tail end of Yennefer's question. It's good that they're thinking through all of this now, at the start of their journey. ]

More than that, will you be able to access that data once we return to the castle, or does Ambrose plan to hide all of that away once we've done the legwork for him? Stephen, I suspect if he is going to trust anyone with that information, it will be you.

[ If Ambrose does choose to lock it all behind close doors, then it would behoove them to find a means of gathering the data themselves. Hopefully in a manner that doesn't require them to hike out to the thaumametors each and every time. ]