Before officially meeting, do you think Matthew and Diana ever just casually passed each other while on campus? Cause I'm imagining Gallowglass watching from an undetectable distance, seeing Diana cross a courtyard, going in the opposite direction of Matthew and Gallowglass is just simultaneously panicking and relieved.

Gallowglass: Oh my God, it's happening! They're going to finally meet! After centuries of waiting and decades of watching, Diana will finally be- Wait! Why is she walking away? Auntie! Turn back right now! Matthew! Turn around and go meet your wife!

They both continue on their way, completely oblivious to who they just walked past.

Gallowglass, unable to decide if this was a good or bad thing: Ok, they didn't meet this time. So, I don't have to leave her yet. But it'll be sooner rather than later now. At least she'll be happy when they do meet...