This is not a very clear cut situation as regards confidentiality at all. I mean, you were sitting there the whole time, for one thing. ...do you want to try the synaesthesia I gave him? He thought it was interesting at first.

:I was sitting there the whole time, but for the last bit it seemed that all of the communication happening was him having thoughts at you, which I was not seeing:

He hesitates for a moment, but the question of how much he trusts Bella feels sort of moot at this point, given that he is empirically trusting her with the entirety of 'helping his other self recover from being tortured'. :And, yes, I will try it: 

She waits until they're no longer walking, and then applies it.

:Oh. That is interesting. Our Mindhealers can do similar things but not as neatly as that: Leareth spends thirty seconds or so looking around at everything. :What else can you do?: 

More kinds of synaesthesia, and agnosias are a class of inability to distinguish things that can get bizarrely specific, like 'which finger on your own hand is that' or 'whose face are you looking at'. I can also make it impossible to notice the left halves of things. To be clear, I didn't invest a lot of time in figuring any of this out, it just happens to be really easy with subtle arts.

:Nayoki would find the research implications of that fascinating. ...To be clear, probably you have better things to do than show her. Anyway. Does he seem to be having thoughts in a way that is more characteristic for me?: 

I have never read your mind to compare.

Leareth takes a deep breath. :You can now, if you want: 

Gosh, okay. What is he thinking.

He's worried about the other Leareth. The worry is pretty well under control, but - it's alarming, seeing another him in that kind of state, knowing that he can be pushed that far, damaged that badly... It's not really surprising, of course, 'multiple subjective years as the prisoner of an evil torture god' is a long way to push someone.

He's doing a lot of trying to predict what the other Leareth is thinking and feeling; he's tempted to just go read him again with Thoughtsensing, but it's clearly not necessary right now and it's so stressful for the other Leareth, he (surprisingly? maybe unsurprisingly) finds that distressing. He's curious, but the main reason he endorses wanting to know the other Leareth's thoughts is because it seems helpful to have an accurate model of his state, in terms of figuring out the best path toward him being okay again, and needlessly reading his mind when it upsets him is clearly not on the best path to him being okay again, so. No.

It's interesting, because he's confused about some of the exact same elements as what the other Leareth must be, but he doesn't have 'all of this is a hallucination' very high among his priors, so his confusion is probably ending up in different places. (He is definitely wondering whether this could be some sort of bizarre simulation, maybe by gods attempting to do Foresight, he's fairly sure that isn't how Velgarth Foresight actually works and he would be a lot more reluctant to create a god here if he thought Their ability to predict and plan relied on creating vast numbers of actually-conscious copies of all the people in the world... But this is all so bizarre, it's worth reconsidering weird hypotheses about reality - he sets that aside for now, though.)

What would the other him be thinking... Well, the compulsions must be pretty confusing, because if Melkor could do compulsions then he would just be making Leareth do lots of magic for him, right? He's not sure if the other Leareth has followed the chain of inference that far. He supposes the other Leareth could be thinking that Melkor already won the war via this method ages ago and is now just having fun, but it would also seem like a weirdly high-effort way for Melkor to amuse himself... Leareth isn't sure because it's not like he personally knows Melkor's tastes or anything. (Why has his life ended up such that the thing he's doing right now is 'trying to model the tastes of a torture god'?)

The other him must be feeling so helpless and scared. Local Leareth hasn't been tortured at all and he would still be freaking out about being stuck somewhere in a confusing situation he couldn't make sense of, with compulsions preventing him from doing magic, he would be so upset about all of that, he feels antsy just imagining it...

He's remembering the glimpse of Nayoki's Sight that she showed him, the crumbled uneven version of his mind, missing the structure at the centre that ought to hold the whole thing together, it's awful - it's sort of his worst nightmare, losing continuity with his past self, he imagines himself in the other Leareth's place and it feels like maybe he could never trust his own mind again, and– he doesn't know what to do, it just hurts.

It's hard, waiting and not knowing. Leareth is pretty good at patience when he has an understanding of the situation and a plan (though this is a hard-earned skill, his younger self wasn't patient at all). He doesn't currently feel like he has a plan, and he's trying to be fine with that, this is still the orienting stage, but it takes some effort. 

"Yeah, he's thinking more similarly to you than I think he was before, but he's not there yet."

Nod. Bella can stop reading his thoughts if she hasn't already, Leareth thinks. (It's mildly uncomfortable that he can't tell if she's doing it, it doesn't seem to interact with Mindspeech shields at all and she could be doing it all the time for all he knew, but - well, he has a decent amount of evidence from her actions that this isn't the kind of thing she would do.)

"Thank you," he says. "I will have someone bring him some innocuous books to read if he wants. You will come back tomorrow?" 

"Stopping," she says when he thinks that. "And yeah."

"All right. I will work on a summary of the advice for other-Vanyel in the meantime." 

She nods. "I'll see you tomorrow same time." And goes.

Sayshen welcomes her back to Haven with a cheerful mental wave. :I realize you can't tell me any details, but I hope that went productively. Want to see some really cute foals?: 

Yes I do!

Cute foals through Sayshen's eyes! There are three of them, they're very tiny, a couple of giggling local girls have braided ribbons into their manes, and they're chasing each other in circles around the field. 

Awwww so small.

Next time she calls Vanyel to check in she tells him Leareth's summarizing some material on shielding for more efficient earcuff-based transfer (since I'm a little skittish about lending it out.)

:That makes sense. We also, er, had a proposal to offer you, if this is something you're able to do: Short pause. :You're claiming to have an inter-world teleport spell but we don't in fact have proof of that, yet, since we can't walk into Angband and check that Leareth is really gone. But, um, if you're done checking the spell, and you can just teleport a person the way you contacted me if you've met another them - you and the young Fëanáro should have met a Ninquë who was an advisor of Finwë's, and if that's all it takes, you have our permission to grab him and then he can see your Velgarth and Arda directly and we'll know you actually can transport people that way: 

I have a spell that calls people to me from a distance, and I have an interplanar teleport that takes me and passengers, but I don't have a combination spell right now. I can work one out but it would be an opportunity cost.

:Ah, so you have a teleport for other people but it's only within one world?: 

Right. I developed that spell and its reverse to allow people to visit loved ones between Valinor and Endorë, at first it didn't transport the caster at all. Fëanáro came up with a teleport that the caster could use to get around, and I grabbed that, and the interplanar transit spell is more like that than the older versions. I can still smash 'em together and get one that works like you have in mind but I'm not even done with all the error checking yet - if there were no time constraints at all I'd really like to redesign the spell from the ground up and try to get it so it has no failure rate at all because, uh, it dropped me in Angband.

:That's a pretty bad problem for a spell to have! Hmm. I'm going to have to think more about how we can verify this if we can't do it that way, but - in theory, could you do the interplanar transit version to get yourself to a place you've been in Valinor, except in our Arda - and then transit one of us back with you to our Velgarth - and then do the in-world teleport version to send them to a place we'd been but you hadn't, and retrieve them, and then go back to our Arda?: 

Once the interplanar transit spell is ready at all, yes.