Don't Own.
Relatively short one, but here's Hagrid's letter to Lily (His language is rather hard to type without the books, but I did my best...). I can't explain this chapter though... or if he'd write it...
Dear Lily,
Harry doesn't know yeh… It's terrible. I'm going to see if me can get him some pictures of yer guys from some of yer old friends. Do yeh think he'd be happy with that? I'm sure he'd love to see yeh and James…
I think he misses yeh guys from what little he knows about you.
He doesn't even know yer a witch and wizard, those Dursleys' didn't tell him. Sorry 'bout that, but I'm not sorry 'bout cursin' that nephew of yers with a pigtail.
Hagrid