Ron looked up at her, surprised. "No, it's rather useful. How I knew you were at your parents' house and everything. Just... It's weird. Knowing that even when I wanted to get away, you would still be able to tell where I was. But even when I had it, I changed my chess piece, so you would know I was with Harry..."
He shrugged. "It was stupid, really. Taking it. That map is useful, after all. We're going back out at work, no more paperwork. So..." His voice trailed off, knowing that she'd need the map for her own sanity then.