Lucy Greenwell

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Tortoise Investigates.

It's half past ten on a December night in 2010.

Jess, who was found abandoned as a newborn baby 22 years earlier, is sitting on her sofa, having a conversation she's waited half a lifetime to have.

She's on Facebook, messaging the person who found her, the woman who spotted a Sainsbury's plastic bag on a lonely verge and looked inside.

Except that's not all that Jess wants from this conversation.

Six months earlier, an elderly lady called Jean, who lived near that verge, had mentioned something.

Rumours, she said, that some people in the village may have known more about the baby than they let on.

The woman Jess is messaging was a nanny who worked nearby at the time.

So once Jess has thanked her, she takes the plunge.

But Jess isn't convinced.

I'm Lucy Greenwell, and from Tortoise Investigates and The Observer, you're listening to Foundling.

Episode 2, Under One Roof.

Jess tells me she has a strong hunch that Jennifer knows more.

But once the Facebook conversation is over, she's at a loss.

Jess tries to put it behind her, get on with her life.

But she's forgotten about something else that's still in play.

Weeks before that Facebook conversation, her sister Laura had posted a message on a family reunion site asking if anyone remembers the nanny who found the Suffolk baby in 1987.

That post is still out there, languishing in some quiet corner of the internet.