She is looking for someone.

"Your photo albums?" Margaret asked, sounding confused. 

Arwen hummed before adding, "Yes, the photo albums that I have from my previous school. I remember keeping it in Granna's place." She paused, trying to remember something, then added, "They must be in the store room. If you ask someone to check the shelves there, they might find it." 

Margaret thought for a moment before affirming, "Sure, I will ask someone to look for him. But," she intercepted briefly, asking, "Arwen can I ask you why are you suddenly looking for it? They are the past that you have long moved on from." 

There was suspicion in Margaret's tone that sounded odd, but Arwen didn't find it strange for she knew that asking the memory of the past which has long forgotten was worth questioning. And Margaret wasn't an outsider. She had been throughout the span, witnessing it all. Her question to her was right and valid.