Mulling over some questions about the timeline of events in ancient Arlathan and how that changes the interpretation of some of Solas' memories.
One question is about the lyrium dagger. When Solas criticizes Elgar'nan for seeking godhood, Elgar'nan refers to him as Mythal's 'annoying lapdog.' Which is quite a strange response if you consider that Solas must have fairly recently crafted the weapon which won the war against the Titans; you'd think that would make Elgar'nan realise that Solas is very valuable and should be placated.
So I wonder if Elgar'nan maybe didn't know that Solas was the one who made the dagger, at that point? After all, we only see Solas making it; there's no indication that he was the one to wield it. And given how ashamed he was about it, I doubt that he would be particularly keen for it to be public knowledge. This whole episode makes much more sense to me if we imagine that Mythal pretended she had made the dagger, or that she didn't tell Elgar'nan at this point who had made it. If so, I'm curious about when Elgar'nan and the others found out (perhaps even not until after they had killed Mythal with it?)
Another question is about the beginning of the Titan war. Mythal's conversation with spirit-Solas is interesting because it seems clear that Solas at least does not know at this point that lyrium is the blood of the Titans: he says 'When you took the glowing stone to build your body, did the earth not shake?' which seems to imply that he thinks it's just a stone and he doesn't understand why this resulted in the earth shaking.
This seems important in terms of the overall moral weight of what the elves/spirits did. If they knew, then they deliberately stole the blood of living creatures and then made them all Tranquil when they tried to defend themselves, so they're indubitably the aggressors. But if they didn't know, then in many ways the whole thing seems more like a tragedy of misunderstanding - the spirits/elves took what they thought was just a stone, and the Titans were afraid and tried to destroy the threat, and the elves had to defend themselves, and the elves and Titans probably had no way of efficiently communicating to get past the original misunderstanding (as Harding puts it in one conversation, they were just too different - in size, language, mode of existence etc) so with horrible inevitability, it was always the case that one group would have to finish by wiping out the other.
This conversation also seems to indicate that the Titans must have taken a significant time to respond; they evidently didn't strike back immediately after the first elves took lyrium, since Mythal seems to have had a body for some time at this point and yet Solas doesn't yet know the origin of the danger. This makes me wonder a lot about the Titans' sense of time: maybe being so big, they also process or experience time on a different scale to the elves? Which of course would contribute to the impossibility of reaching mutual understanding.
Though I also wonder if Mythal knows more than she's letting on at this point, and deliberately isn't telling Solas because she knows he wouldn't consent to make a body out of the blood of another creature. Which, if true, would make this conversation even more upsetting; she's pushing him into doing this knowing full well that it would be morally repugnant to him.
I also have a lot of questions about the timescale on which Solas decided to rebel and the amount of time that passed between the death of Mythal and him making the Veil. I guess we'll never know, but anyway, interesting to think about!