Well that's... Ah. So that's what it was. Merlin blinks, expression uncharacteristically a bit surprised as the memory and its associated feelings settle into place. There might even be a hint of a genuine smile slipping out before he quickly schools his features back into his usual neutral demeanor of late.

"I see," he says at last. "Well, you don't need to trouble yourself over it anymore now, at least."

He has absolutely no intention of admitting to how significant that little conversation was for him if he can help it.