Lorna drops by as Sefton eats lunch, and returns the book that Sefton then gives to Neiran in the scene posted prior to this. Let's do the time warp again... They speak of the Instigators, and how history is recorded.
Sefton is making good on his promise to help Lorna with her reading, although they spend more time talking than practicing. She fans the flames of his curiosity higher, and they speak of many things.
One evening, Sefton and Lorna meet in the records room. They speak, and Sefton hears some very interesting things. He also makes an offer, which is, perhaps unwisely, accepted.
Lorna is roped into bringing the Headmaster's evening meal, and stays for a chat. Who learns more, I cannot say. I think that in terms of fascination, they are about equal.