Anchor sighs heavily. How does this keep happening to her? Well, to people she knows.
"Trog's Tavern. It's a magical inn that connects to all different worlds. You went in there at least sixteen months ago. The blow to your head suppressed your memories, and you came to us to get help. I've finally brought them back, but it looks like whatever happened in the meantime has been forgotten."
She opens her book and repeats the diagnosis spell to see if she can find any lingering effect of the magic on his brain.