Order Only: another owl; another clue

I got another owl from Harry today. It matches his handwriting, and it sounds like him, so I don't think it's someone pretending to be him to draw me out.

He asked for a photograph of Lily and James - so that he'll know I'm not lying, he says.

What I want to know is how he would know it's them. I mean, he says he'll recognise them. How is that even possible?

But then I got to thinking that it might be related to whatever it was he found, that Malfoy doesn't want him to think about. Malfoy tells him it's dangerous. Could Voldemort have something that shows one's past? Or one's family? I can't think why he'd own something like that.

If we could just figure out what he's got, we might have a clue what he wants with that other item. Or is he still looking? Minerva?

I found something else while I was rummaging about for the photo (yes, I sent him one. Two, actually. And before you say it, Molly, I'm being careful). Might come in handy, so I packed it away in my traveling rucksack and I'm heading back out in search of boomslang skin and powdered bicorn horn. With any luck I should have a shipment for Laszlo Ltd within two weeks.