Eldest Hobbit is studying "When my Gran was a girl..." or "olden days" as he calls it. I scanned a few photos for him to take in, glad that they will have a full history for at least one side of their family. How important knowing your own family tree is I am not sure. Perhaps to have anecdotes to colour in the characters of people you will never know but who you are still attached to through relations. To know what was there before you, where your family came from.
I never knew my maternal grandfather. Yet despite his death when I was only a few months old I look at his kind face in these old photographs and I do feel as though I know him. I've pieced together who he was from stories and memories from other family members, the things he went through during the war and after, his brothers who nearly all died in one battle during the war that went before (which luckily both my grandfathers were only just too young to be sent into but both of them had brothers who went - miraculously all survived although not without scars, one example; my father's uncle returned without sight or hearing and with severe lung problems.)
In fact the Hobbits' own grandfather was in the RAF during WW2 as a teenager seeing things that no teen should see. They will one day be able to place that history with him, they will be able to see him as a young man on a cool motorbike (a motorbike that once nearly wiped out this linage they are part of) and know the background that made him into the Grandpa they love.
I have the photographs, I will pass them on. And the stories will go on to another generation.